483 



The above described species differ from all others of the 

 genus that I am acquainted with by having a distinctly 5- 

 carinate pronotum. 



Columbisoga gen. n. figs. 1, 2, 3. 



Ty])e campbclU. Width of vertex at base but sliglitly greater than 

 length, apex half the width of base, sides straight, apex projecting 

 angularly in middle showing the small V at base of face, an obscure, 

 simple carina down middle, a small pit on each side near base ; base 

 of vertex sinuous, about middle of eyes; length of face three times the 

 width, widest in middle, sides slightly arcuate, lateral carinae distinct, 

 median carina with a minute fork at base which projects beyond 

 vertex in dorsal view; transverse carina on gena distinct; clypeus 

 tricarinate on basal two thirds, curved on apical third; antennae barely 

 reaching base of clypeus, both joints terete, second joint twice the 

 length of first, first slightly enlarged at apex; pronotum tricarinate, 

 lateral carinae convergingly curved, reaching hind margin, a small pit 

 on each side near middle ; mesonotum tricarinate ; hind femora not 

 reaching to apex of abdomen, much shorter than tibia, tarsi shorter 

 than tibiae, first tarsus about equal to the other two together, spur 

 nearly as long as first tarsus, thick, concave on inner surface, a small 

 tooth on apex, none on hind margin. Media touching both radius and 

 cubitus; forking of subcosta and radius and the forking of cubitus about 

 the same level. 



This genus belongs to the Tropidocephalini and comes near 

 to Colnuihiana Muir ^ and Sogatopsis Muir,- but nearer the 

 former. It can be distinguished from Coluinbiana by its longer 

 and narrower face, by the shape of the vertex which has 

 an obscure, simple median carina and no Y, and by the lateral 

 carinae of the pronotum curving inward and reaching the hind 

 margin. Sogatopsis can be distinguished from it by the 

 angular basal joint of antenna, the rounded apex of vertex, 

 shorter face, and the presence of a cross-vein between the 

 media and radius and media and cubitus. 



Columbisoga campbelli ^^ji. n. fii^s. 1, 2, .S. 



Male. ]\Iacropterous; light cliestiiut. lighter over carinae of vertex 

 and tliorax, especially the mediaii carinae; abdomen darker. Tegniina 

 dark chestnut except the hyaline spot over tiie middle of nicilian and 

 extending into radial cell, and hyaline in first four apical cells; veins 



1 Can. Ent. 1!)19, p. 3.'. figs. 6-a, 7-a. 

 -'Pro. Haw. Ent. Soc. IT. n. (]•.)^:^) p. 2^17 



