Dryinus laotianus, Olmi & Xu & Guglielmino, 2015

Olmi, Massimo, Xu, Zaifu & Guglielmino, Adalgisa, 2015, Description of Dryinus laotianus (Hymenoptera: Dryinidae), a new species from Laos, Florida Entomologist 98 (2), pp. 560-560 : 560

Dryinus laotianus sp. nov. ( Figs. 1 and 2 )

Description

Holotype female. Fully winged. Length 6.0 mm. Head black, except mandible, clypeus, gena, face near clypeus and shortly along orbits, ventral side of head around mouth ferruginous; antenna testaceous; mesosoma black, except lateral margins and posterior collar of pronotum testaceous; metasoma brown; legs testaceous, except distal extremities of tibiae darkened, part of metacoxa and outer side of club 1 Tropical Entomology Research Center, Via De Gasperi 10, Viterbo, 01100 Italy

2 Department of Entomology, South China Agricultural University, Guangzhou, Guangdong 510640, P. R. China

3 Department of Agriculture, Forests, Nature and Energy, University of Tuscia, Viterbo, 01100 Italy of scutum. Scutellum and metanotum shiny, punctate, unsculptured among punctures. Metapleura dull, rugose. Propodeum dull, reticulate rugose, without longitudinal keels on posterior surface; dorsal surface more than twice as long as posterior surface (35:15).Fore wing with two dark transverse bands; distal part of stigmal vein longer than proximal part (23:7). Protarsal segments in following proportions: 28:3:7:22:32. Segment 3 of protarsus produced into hook. Enlarged claw ( Fig. 1 ) with one strong subapical tooth and one row of 13 lamellae. Segment 5 of protarsus ( Fig. 1 ) with two rows of 23 lamellae; distal apex with about 19 lamellae. Tibial spurs 1/1/2. Male: Unknown.

Type material

HOLOTYPE 1 female, LAOS: Hua Phan Province, Phou Pan, Ban Saleui , 20° 13’ 30’’ N 103° 59’ 26’’ E, 1350–1900 m, 28.VI.2013, C. Holzschuh and locals (OLL).

of metafemur brown. Antenna clavate; antennal segments in following proportions: 10:6:50:27:22:10:8:7:6:9; rhinaria present on segments 5–10. Head slightly swollen, shiny, strongly punctate and sculptured by irregular striae; frontal line complete; occipital carina complete; POL = 3; OL = 4; OOL = 8; OPL = 2; TL = 8; greatest breadth of posterior ocelli about as long as POL. Pronotum shiny, punctate, unsculptured among punctures, with some longitudinal keels on lateral regions and posterior transverse furrow, crossed by two transverse impressions, anterior impression very weak and posterior one strong; disc humped; posterior collar short; pronotal tubercle not reaching tegula. Scutum ( Fig. 2 ) shiny, punctate, unsculptured among punctures, strongly punctate near posterior margin. Notauli incomplete, reaching about 0.9 length Etymology

The specific name derives from Laos.

Remarks

The characters distinguishing the new species are the following: head and mesosoma partly black or brown;antennal segments 4–5 not broader than other segments; posterior ocelli not touching occipital carina; pronotum partly black, humped, with distinct posterior collar; scutum punctate, unsculptured among punctures; metapleuron without shiny and unsculptured area; dorsal surface of propodeum more than twice as long as posterior surface; segment 1 of protarsus slightly longer than segment 4. D. laotianus is close to D. stantoni Ashmead 1904 and D. mansus Olmi 1992 . The main differences among these three species regards the sculpture of the scutum (punctate and unsculptured among punctures in D. laotianus ; completely reticulate rugose in D. mansus ; granulated and occasionally with posterior surface reticulate rugose in D. stantoni ). Following the description of D. laotianus , the key to the females of the Oriental species of Dryinus published by Xu et al. (2013) can be modified by replacing couplet 27 as follows:

27. Scutum punctate, unsculptured among punctures ( Fig. 2 )................................................... D. laotianus sp. nov. —. Scutum granulated or completely or partly reticulate rugose.............................................................. 27’

27’. Scutum completely granulated, or at most with posterior surface reticulate rugose............................. D. stantoni Ashmead —. Scutum completely reticulate rugose........................................................................ D. mansus Olmi

Figures

Fig. 1. Chela of holotype of Dryinus laotianus sp. nov. Scale bar 0.24 mm.

Fig. 2. Part of mesosoma of holotype of Dryinus laotianus sp. nov. (scutum indicated by an arrow). Scale bar 0.56 mm.