1910] North American Paniscini 197 



SEXUAL DISTINCTIONS. 



Aside from the presence of a sting in the females and of 

 more or less copulatory organs in the male, other differences 

 may be noticed in the sexes. Ocelli seem to be closer together 

 in the male, and also to the compound eyes than in the females. 

 The male has fifty-seven segments in the antennae, and the 

 female fifty-eight, but it would seem probable, considering the 

 large number of segments that this might vary somewhat. 



TABLE OF GENERA. 



Terminal tooth of mandibles longer than the inner; cheeks and temples not 

 broad; scutellum more or less margined laterally; transverse median nervure dis- 

 tinctly postfurcal to the origin of the basal nervure Paniscus Gravenhorst. 



Teeth of mandibles equal in length; cheeks and temples broad; scutellum not 

 margined laterally; transverse medial nervure interstitual with the origin of the 

 basal nervure, rarely slightly postfurcal Ofheltes Holmgren. 



DESCRIPTION OF SPECIES. 



Opheltes glaucopterus (Linn). Description taken from Provancher. 

 Faune Entomclogique Du Canada, TI, 1883. p. .3.59. 

 Female — Length, 6cS inch. Black variegated with red. Head varied 

 with russet, except a black spot covering all the vertex and the back 

 side of the head. Antennae russet, brown at the extremity, almost as 

 long as the body. Thorax black; scales clear, a line before and another 

 below, two lines on the back of the mesothorax, and its exterior bor- 

 ders, also sometimes the scutellum, all the legs with trochanters, the 

 abdomen except the last three segments, of a yellowish russet color. 

 Wings with the costa and the stigma yellow, the nervures brown; 

 areola small, not petiolated, subtriangular ; median nervure not appen- 

 diculate, arched. Metathorax bearing a little elevated canal in the mid- 

 dle, and a carinae on each side with another transversal at the apex, 

 these carinaes being elevated in the form of acute tubicles in certain 

 spots. Hind part (hind coxae) russet black at the base. 



Paniscus alaskensis, Ashm. 



Proceevdings of the Washington Academy of Sciences, IV, 1902, pp. 237-8. 

 Male — Length 10 mm. Head yellow, with purpHsh-brown eyes, and 

 very much as in Paniscus geminatus vSay, except that the ocelH are 

 not placed on a black spot, and the lateral ocelli do not quite touch the 

 eye margin, as in that species. The thorax and abdomen are pale 

 honey-yellow; a stripe on sides of prostemum, the lateral margins of the 

 mesonotum, and a stripe on the parapsidal furrows behind, are yellow- 

 ish-white; the apical transverse carina is indicated only laterally, being 

 wholly obliterated medially, the surface of the metanotum before it 

 being very finely, transversely aciculate, behind it polished and impunc- 

 tatc. Wings hyaline, the venation as in P. geminatus, the costal vein 

 and the stigma yellow, the subcostal vein and the internal veins being 

 brown or brown black. External claspers similar to those in P. gem- 

 inatus but slightly narrower. 



