Colocistis crassa (Bradley)

Kimsey, Lynn S. & Wasbauer, Marius S., 2013, Revision of the brachycistidine genus Colocistis Krombein, 1942 (Hymenoptera, Tiphiidae), Journal of Hymenoptera Research 33, pp. 1-24 : 8-9

Colocistis crassa (Bradley) Figures 4 , 19, 22 , 35 , 44 , 52

Brachycistis crassa Bradley, 1917:277. Holotype males; USA: California, Fresno County, Coalinga (CUIC).*

Diagnosis.

Colocistis crassa and Colocistis pilosa share a distinctive modification of metasomal sternum II, which has the basal area elevated and separated from the rest of the sternum by a transverse declivity. These two species can be separated by the castaneous body color in Colocistis crassa (black in Colocistis pilosa ), clypeus with a well-developed medial tubercle (no tubercle in Colocistis pilosa ) and large compound eyes and ocelli (small in Colocistis pilosa ).

Description.

Male.

Body length. 9-16 mm.

Head ( Fig. 4 ). Compound eyes enlarged, extending well beyond temples; ocelli enlarged, diameter of lateral ocellus at least 0.7 × OOL; impressed line present between lateral ocelli; antennal socket rim thickened and carinate ventrolaterally; clypeus with median tubercle, visible above mandible in lateral view, apex not bounded laterally by strong teeth; gular carina not raised; LID 0.7 × UID; flagellomere I length 3.2-3.3 × breadth; flagellomere II length 2.7-2.8 × breadth; flagellomere IX length 5.7-5.8 × breadth; occipital carina strong, incomplete ventrally; hypostomal carina not raised; mandible narrowest submedially, tapering apically toward ventroapical tooth.

Mesosoma. Pronotum nearly vertical anteriorly, punctures separated by 0.5-1.0 puncture diameters, shoulders well developed, not produced laterally; forefemur without stout spines; foretibia without spines except apically; basitarsus with two spines on outer surface; tibial spur 0.9 × length of basitarsus; hindcoxal longitudinal dorsal carina forming obtuse angle basally; scutal and mesopleural punctures 1-2 puncture diameters apart; scutellum somewhat curved above level of propodeum, coarsely punctured with large, polished impunctate area medially; postscutellar punctures 1-2 puncture diameters apart; propodeum with long dorsal surface, nearly impunctate, with wide medial, longitudinal trough, reaching carina separating dorsal from posterior surfaces, posterior surface with shallow punctures, 0.5-1.0 puncture diameters apart, lateral surface punctures 0.5-1.0 puncture diameters apart dorsally, nearly impunctate ventrally; forewing with 3 submarginal cells; costa extending along wing margin beyond stigma.

Metasoma. Tergum I with transverse carina at apex of frontal declivity ( Fig. 22 ); sternum II with anterior portion slightly raised and separated from remainder of sternum by a transverse declivity ( Figs 19, 22 ).

Genitalia ( Figs 44 , 52 ). Gonostylar apex somewhat excavate in lateral view; aedeagus abruptly decurved in lateral view, apex with dorsally projecting process.

Color. Head and body unicolorous, castaneous; vestiture pale brown.

Female unknown.

Distribution

( Fig. 35 ). USA: Arizona: Cochise, Coconino, Gila, Graham, Maricopa, Pima, Pinal, Santa Cruz, Yuma counties; California: Alpine, Fresno, Imperial, Inyo, Kern, Kings, Lassen, Los Angeles, Madera, Merced, Mono, Monterey, Riverside, San Benito, San Bernardino, San Diego, San Luis Obispo, Santa Barbara, Santa Clara, Sonoma, Stanislaus, Tuolumne, Tulare, Ventura counties; Idaho: Ada, Elmore, Owyhee counties; Kansas: Stanton County; Nevada: Churchill, Esmeralda, Eureka, Humboldt, Lincoln, Nye, Pershing, Washoe counties; New Mexico: Dona Ana, Eddy, Hidalgo, Luna, Quay counties; Texas: Alpine, Brewser, Culberson, El Paso, Jeff Davis counties; Utah: Ogden County; Mexico: Baja California, Baja California Sur, Chihuahua, San Luis Potosi, Sinaloa, Sonora; 1250 males were examined (BME, CAS, CDFA, EMEC, KSBS, LACM, MCZ).

Figures

Figures 1 - 12. 1 - 8 Front view of male head. 9 Lateral view of male head 10 - 12 Ventral view of female head. Abbreviations: LID = least interocular distance, OcC = occipital carina; OOL = ocellocular distance, THC = transverse hypostomal carina, UID = upper interocular distance.

Figures 13 - 24. 13, 14 Male forewing. 15 Ventral view of male hindcoxa 16 Dorsal view of male propodeum 17 dorsal view of male mandible 18 lateral view of mandible 19 Ventral view of male metasomal sterna I-II 20, 22 Lateral view of male metasomal segments I and II 21, 23, 24 Ventral view of female metasomal sternum I. Abbreviations: SM- 1, 2, 3 = submarginal cells 1 - 3.

Figures 33 - 36. Distribution maps of Colocistis species.

Figures 41 - 48. Ventral view of male genital capsule.

Figures 49 - 56. Lateral view of male genital capsule.