1865.] 283 



Male. — Resembles the female, but the antennae are nearly as long- 

 as the body ; the face is entirely yellow, as well as the basal margin of 

 the clypeus, which has a small black spot on each side ; the front, be- 

 hind the antennae, is black except the orbits which are yellow ; the 

 lateral yellow margins of the mesothorax are broader and more distinct, 

 there is a large yellow mark on the disk connected with the lateral 

 stripe anteriorly by a narrow line on each side of the middle ; sides of 

 the pleura, except a space beneath the posterior wings, yellow ; the 

 apical half of the metathorax is yellow, dilated on the middle anteriorly, 

 there is also an obscure yellowish, rounded spot on each side at base ; 

 the fifth segment of the abdomen has an obscure yellowish apical band. 

 Length 6 lines; expanse of wings 10£ lines. 



Three 9 , one % , specimens. 



We have a rather smaller species belonging to this genus, found in 

 the Eastern and Middle States, and which I have named G.fasoiata. 

 It is black, with the face, cheeks, a line or spot on each side of the 

 mesothorax, tegulfe, a line beneath the anterior wing, anterior margin 

 of the pleura, scutellums, posterior half of the metathorax, the legs in 

 part, and a broad apical band on each abdominal segment, yellow ; the 

 wings are deep yellowish-fuscous, with a brassy and subviolaceous gloss. 

 I shall describe it more fully in a future Paper. 



Genus CAMPOPLEX. Grav. 

 Campoplex laticinctus, n. sp. 



Black; wings hyaline; third and fourth segments of abdomen rufous. 

 Female — Black, opaque, clothed with short pale pubescence ; face 

 closely punctured ; upper margin of mandibles testaceous ; antennae 

 rather stout, more than half the length of the body, entirely opaque 

 black. Thorax very closely punctured ; metathorax depressed on the 

 disk and covered with fine transverse rugae, with a well-defined, irregu- 

 lar arcuated carina at base; tegulae piceous-black. Wings hyaline, 

 faintly tinged with dusky about the apical margins; nervures fuscous; 

 areolet large, subtriangular. Legs piceous-black, the anterior pair yel- 

 lowish in front. Abdomen very slender at base, gradually broader and 

 compressed beyond the second segment, black, somewhat shining the 

 third and fourth segments bright rufous, the second sometimes tinged 

 with fuscous or rufous ; first segment long, very slender at base, and 

 somewhat swollen at tip ; second segment not as long as the first, and 

 nearly three times longer than broad, subcompressed ; ovipositor very 

 short. Length 6 lines ; expanse of wings 8 lines. 

 Two specimens. 



