CHALCID FLIES OF GENUS PERILAMPUS — SMULYAN 399 



opaque although sometimes rather closely lineolated; pronotum 

 laterally as a rule shorter or no longer than the prepectus measured 

 on a line bisecting angle of latter at tegula of wing; axilla with a 

 triangular or roughly triangular extension about as wide as or some- 

 what wider than long on side of scutellum, its base extending to or 

 above middle of axilla, surface of axilla sloping toward base of exten- 

 sion and not depressed above base of extension; basal shallow furrows 

 on underside of apex of scutellum not turning caudad medially but 

 united at median line to form a single gently curved furrow; wing 

 hairs short and dense. 



Abdomen: Posterior face wider than long or as wide as long, rarely 

 longer than wide, with some conspicuous hairs on each side of the 

 middle; first tergite strongly transverse, usually coarsely sculptured 

 but rarely smooth, its anterior margin strongly elevated and convex 

 completely masking posterior aspect of neck of propodeum and very 

 often resting on latter so as to give the appearance of a distinct 

 petiole. 



Color: Green or greenish, the propodeum sometimes black; notuni 

 of thorax including areas along inner margins of parapsides more or 

 less coppery or bronzy; upper part of head often and rarely the whole 

 head somewhat bronzy or coppery; abdomen black; flagellum of 

 antenna grajdsh dark brown to ferruginous, the underside except 

 apically usually paler than above; scape more or less concolorous 

 with head; femora greenish or bronzy with apices narrowly testaceous; 

 tibiae reddish testaceous to ferruginous; tarsi testaceous to reddish 

 testaceous; wings hyaline, sometimes with a small darkish or brownish 

 spot or patch at apex of submarginal vein; veins brown or reddish 

 brown, paler basally. 



Male. — Length about 1.75-2.25 mm. Similar to female; portion of 

 scape bearing sensorial punctures not greatly broadened apically 

 and occupying approximately one-half of scape, sensoria fine. 



T?/pe.— U.S.N. M. no. 18302. 



Redescribed from 47 females and 19 males, including type, allotype, 

 and paratypes, all in the United States National Museum. This 

 appears to be a western species. 



Distribution. —ColoTsnio; Idaho (July). 



PERILAMPUS GRANULOSUS Crawford 



Perilampus granulosus Crawford, Proc. Ent. Soc. Washington, vol. 16, p. 73, 

 1914. 



Female. — Length aboutTl.75-2.75 mm. Head: Frons without a 

 carina, meeting vertex in a curve; emargination of fron to vertex not 

 very deep or pronounced; cheeks straight or nearly straight; head in 

 front view slightly to rather distinctly transverse and usually sub- 

 triangular; lower extremity of eye above level of base of clypeus; 



