Habronyx citrinus Porter, 2007

Porter, Charles C., 2007, Habronyx Foerster (Hymenoptera: Ichneumonidae: Anomaloninae) in Andean and Neantarctic South America with description of new species from Bolivia and Chile, Insecta Mundi 2007 (20), pp. 1-8 : 4-5

Habronyx citrinus Porter , new species

( Figure 1-3)

Description. Female Holotype. Color: antenna dull black with a yellow blotch below on scape; mandible yellow with apical teeth black; clypeus and face yellow with black on tentorial pits and with a large, ventrally narrowing black blotch which reaches from below each antennal socket for about 0.7 times the distance to tentorial pit; vertical orbit with a brownish yellow mark near top of eye, and hind orbit with a brownish yellow band that reaches from its dorsal 0.3 ventrad to and across malar space; head otherwise shining black; mesosoma shining black; gaster light orange with faint dusky staining on dorsum of second tergite and laterally on third tergite, more distinctly blackish toward apex on fourth tergite, and blackish almost throughout on fifth and following tergites and on last sternite; fore and mid legs with coxae shining black but otherwise pale orange with weak dusky staining on tarsi; hind leg with coxa and trochanter shining black, trochantellus pale orange, femur black with orange inconspicuously on base, tibia orange on basal 0.5 and black on apical 0.5, first tarsomere orange with black on apical 0.15, second to fourth tarsomeres mostly black, fifth tarsomere sordid brown; wings hyaline faint brownish staining.

Length of fore wing: 9.9 mm. Flagellum: short, 0.4-0.5 times as long as body, first segment 3.2 times as long as deep at apex. Median field of face and much of clypeus coarsely and densely punctate. Front: with a weak, median carina from mid ocellus to level of antennal sockets. Vertex: strongly wrinkled with stemmaticum elevated, ocello-ocular line 2.5 times as long as width of lateral ocellus and line from ocellus to occipital carina 0.7 times as long. Occipital carina: bent mesad dorso-laterally, so that it continues in an almost straight line across top of head. Hypostomal carina: weakly elevated, scarcely higher than adjoining occipital carina, not flange-like. Temple: with numerous strong medium sized punctures that are mostly separated by smooth interspaces and which emit very long and dense, strongly projecting white setae. Mesoscutum: highly polished, on median lobe with dense, sharp small to medium sized punctures and on lateral lobe with similar but sparser punctures. Mesopleuron: prepectal carina sharp on underside just behind the fore coxae but not projected dorsad onto lateral surface of mesopleuron; mesopleural disk on lower 0.5 with coarse, mostly differentiated, adjacent to slightly coalescent punctures; mesopleural suture not anteriorly carinate between speculum and base of mid coxae. Submetapleural carina: produced near base into a large subtriangular flange. Wing venation: intercubital vein joins cubitus well basad of second recurrent vein; nervulus postfurcal by about 0.4 times its length; nervellus strongly reclivous, broken near middle, discoidella sclerotized throughout. Hind leg: femur 6.7 times as long as deep; second tarsomere 3.6 times as long as deep. Gaster: postpetiole 1.6 times as long as wide from spiracle to apex; first sternite ends well distad of spiracles.

Male Allotype. Differs from female as follows. Color: black wedges on each side of face reach all the way to clypeal suture; yellowish band on hind orbit much narrowed below and partly interrupted in malar space; fourth tergite uniformly pale orange; fifth tergite orange with black on apical 0.3.

Length of fore wing: 9.1 mm. First flagellomere: 2.8 times as long as deep at apex. Ocello-ocular line 2.1 times as long as width of lateral ocellus, and line from ocellus to occipital carina 1.0 times as long. Hind leg: femur 6.8 times as long as deep, second tarsomere 3.3 times as long as deep.

Type material. Holotype female, CHILE, Región Metropolitana, Cajón de Maipo, El Manzano, XI-1989, Pérez de Arce [ FSCA] . Allotype male, CHILE, Región Metropolitana, Cajón de Maipo, El Manzano, XII- 1990, Pérez de Arce [ FSCA] . Paratypes: 1 female and 3 males, CHILE , 1 male, Región Metropolitana, Santiago, Macul, XI-1989, Pérez de Arce [ FSCA] ; 1 female, Región Metropolitana, Cajón de Maipo, El Manzano, XII-1990, Pérez de Arce [ AEIC] ; 1 male, El Peumo, Río Maipo , I-1953, L.E. Peña [ AEIC] ; 1 male, Región O’Higgins, Las Nieves, Cordillera Rengo , 12-26-XI-1947, L.E.Peña [ FSCA] .

Variation. Color: mandible sometimes black on as much as its basal 0.5; apical margin of clypeus sometimes light brownish; face sometimes wholly yellow; hind orbital band sometimes dull brownish, sometimes very broad above or in other specimens very narrow and not reaching below as far as malar space; tergites 2 and 3 sometimes with extensive but faint dusky staining; fore and mid trochanters may be blackish, fifth tergite and sternite sometimes stained with orange brown. Length of fore wing: up to 11.3 mm. First flagellomere: 3.0 times as long as deep at apex. Hind femur: 6.4-6.9 times as long as deep.

Relationships. Gauld (1997) divides the New World species of Habronyx into two subgenera: Camposcopus Foerster , in which the prepectal carina reaches inclivously upward to touch the anterior margin of the mesopleuron at about its mid height, and Habronyx (s. str.) in which the prepectal carina extends some distance dorsad but is nearly vertical so that its upper end does not approach the front margin of the mesopleuron. However, the present species, and the very similar H. punensis n. sp. represent a third character state, because they have the prepectal carina not at all prolonged upward onto the mesopleuron but developed only across the mesosternum just behind the fore coxae.

Habitat Notes. Habronyx citrinus occurs in the Mediterranean biotic province of central Chile, where it inhabits well watered ravines and valleys in the Andean foothills, whose sclerophyllous flora includes such characteristic trees and shrubs as Lithraea Miers and Schinus L. ( Anacardiaceae ), Peumus Molina (Monimiaceae) , Acacia Mill and Prosopis L. (Leguminosae), Maytenus Molina (Celastraceae) , Quillaja Molina (Rosaceae) , Porlieria Ruiz and Pav. (Zygophyllaceae) , and Beilschmiedia Nees and Cryptocarya R. Br. (Lauraceae) .