286 [April 



middle; scutellum tinged with yellow, rather prominent and closely 

 punctured; metathorax opaque fulvous, reticulated, with a central lon- 

 gitudinal channel, pubescent; tegulae tinged with yellowish. Wings 

 ample, dark fuscous, with a more or less violaceous reflection, some- 

 times tinged with deep yellowish about the base ; nervures fuscous, 

 pale at base, costa and stigma yellowish. Legs yellowish; the four 

 anterior femora behind, tinged with fulvous ; tarsi dusky at tips ; pos- 

 terior coxa), trochanters above, and their femora fulvo-ferruginous ; 

 extreme tips of their femora and the apical fourth of their tibia?, black. 

 Abdomen about twice the length of the head and thorax, fulvous, the 

 two basal segments long and very slender, the remainder broad and 

 much compressed ; basal segment long and slender, cylindrical, very 

 slightly swollen at tip. second segment linear, subcompressed, slightly 

 longer than the first, its dorsal edge blackish ; venter tinged with yel- 

 lowish; ovipositor very short. Length 91 lines; expanse of wings 

 1 1 lines. 



Male. — Resembles the female, but the antennas are longer, the pleura 

 beneath, between the four anterior legs, is deep black, as well as the 

 posterior femora above and the extreme apex of the abdomen. 



Four 9 , one % ■ specimens. 



Var. a. — C. apicaijs. 9 . — Most of prothorax, the pleura, except a 

 large rufous stain on each side, the sides and base of the metathorax 

 more or less, and the two apical segments of the abdomen, black; the 

 mesothorax in front is sometimes more or less dusky. 



Six $ specimens. 



Var. b. — C. seminiger, % 9 . — Vertex, occiput and thorax entirely 

 black in % ; the mesothorax in 9 with two obscure rufous stains behind 

 the middle, the scutellum entirely, and two stains on the disk of the 

 metathorax, rufous; antenna) of % brown-black; posterior femora black, 

 most of the femora of the % , also black ; two apical segments of the 

 abdomen in both sexes, black ; sometimes the whole of the fourth seg- 

 ment and some of the ventral segments, are also black. 



One 9 , two £ specimens 



Var. c. — C. NIGRICANS, 9 . — Head rufous, tinged with yellowish in 

 front, the vertex and tips of mandibles black ; antenna? fusco-ferrugi- 

 nous ; thorax dull black, the mesothorax above obscurely stained with 

 rufo-piceous ; tegula? rufous; wings colored rather darker, the costa 

 and stigma fuscous ; legs rufous, the two anterior pairs ferruginous, 

 the posterior coxa), femora, and apical half of their tibiae, black, their 

 tarsi yellow, blackish at extreme tips ; abdomen rufous, with the dorsal 



