406 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 83 



PERILAMPUS SIMILIS Crawford 



Perilampus similis Crawford, Proc. Ent. Soc. Washington, vol. 16, p. 73, 1914. 



Female. — Length about 1.75-3.75 mm. Head: Frons without a 

 carina, although rarely (more particularly in the males) with a 

 semblance of a carina on the upper part; the union of vertex and 

 front usually forming a sharp angle in the ocellar region; front and 

 face smooth, except for hair punctures, rarel}'^ aciculate or slightly 

 wrinkled along lateral margins of clypeus; cheeks straight or nearly 

 straight; head in front view transverse, sometimes only slightly so, 

 usually subtriangular in outline (less often so in the males); eyes as 

 a rule not reaching level of base of clypeus (usually reaching same 

 in males). 



Thorax: Area along inner margins of parapsides smooth; inter- 

 spaces between umbilicate punctures on mesoscutum and scutellum 

 medially usually slightly thickened or widened (less commonly so 

 in the males), the punctures with the more conspicuously thickened 

 walls round or roundish ; anterior edge of pronotum at lateral angles 

 not depressed, the punctate portion of pronotoprepectal area at dorsal 

 margin occupying half or more than half of distance from anterior 

 edge of pronotum to tegula of wing; axilla with a triangular or roughly 

 triangular extension as wide as or wider than long on side of scutellum, 

 the base extending to or above middle of axilla, face of axilla sloping 

 more or less toward base of extension and not depressed or excavated 

 above base of extension; basal shallow furrows on underside of apex 

 of scutellum turning caudad medially and meeting or nearly meeting 

 on the median line to form an acute angle, rarelj'- an obtuse angle; 

 propodeal neck, except very rarely, coarsely sculptured; wing hairs 

 usually pale and wings clear; apex of postmarginal vein usually 

 distinct. 



Abdomen: Posterior face usually longer than wide, often consider- 

 ably so (latter condition more common among the males) ; first tergite 

 petioliform, without an elevated anterior margin or flange and more 

 or less rugosely sculptured, sometimes in large part smooth. 



Color: Head black or black with a metallic tinge, rarely in part 

 bronzy; thorax black, the punctate portion of notum usually bronzy 

 black, rarely greenish black, the areas along inner margins of parap- 

 sides usually with a greenish or bronzy tinge, otherwise metallic black; 

 pleural region usually with a very slight greenish or bronzy tinge or 

 reflection; abdomen sinning black, sometimes with a greenish tinge; 

 flagellum of antenna grayish dull dark brown to ferruginous and 

 usually more or less pale beneath; scape black or greenish; femora 

 brown to black, sometimes with a greenish cast or reflection w^hich is 

 usually more pronounced on the posterior pair, their apices sometimes 

 testaceous or reddish; tibiae brown to ferruginous, sometimes with a 

 slight metallic cast, the anterior pair usually reddish testaceous except 



