72 Dr. A. S. Packard, Jr's Revision of the, 



B. Of large size; head large transverse, front golden; basal ring of 

 abdomen with two subtriangular sinuate bands. 



9 . Femora yellow and rufous ; two spots on meso- 



flank C. 10-maculatus, Say. 



9 • Femora rufous, no supplementary spot behind the 



tubercle; base of abdomen fuscous C. aurifrons, Smith. 



J. Head cubical: body stout: meso-scutellum entirely 

 rufous yellow, abdomen with four very contigu- 

 ous fasciae C. cubensis, Cresson. 



C. Head very transverse, abdomen as long as head and thorax toge- 

 ther, body elongated, 2 — 3 pairs of terminal bands; front silvery, 

 clypeus often subcnpreous. 



£. Head narrow, abdomon with three terminal bands. 



9 • Abdomen broad, flattened C. rufifemur, Packard. 



% . Head broad ; abdomen with two terminal bands. 



9 • Tip narrow compressed, channelled deeply. ..C. chrysarginus, St. Farg. 



9. Larger than preceding: body very black; femora 



broadly tipped with yellow C villosifrons, Packard. 



£ . Femora one-half black and yellow; abdominal fas- 

 ciae very broad; three terminal bands C. Packardii, Cresson. 



%. Five broad abdominal bands: one basal pair of tri- 

 angular sinuate fasciae. 9 • Tip of the abdomen 

 very broad and flat; body slender C. dilectus, Cresson. 



D. % . Head triangular. 9 . Head quadrangular in front, not narrow- 

 in"- as usual towards the insertion of the mandibles: basal abdomi- 

 nal rins- immaculate. 



o 



9 . Very large size ; fore femora streaked above with 



rufous C quadrangularis, Pack. 



%. Abdomen 10-spotted; head deeply channelled in 

 front. 9 • Two anterior femora tipped with yel- 

 low C. singularis, Smith. 



%. Head deeply channelled in front: middle femora 



broadly rufous; abdomen 14-spotted C. 14-maculatus, Pack. 



9. Femora entirely black, body longer and slenderer 



than usual; scutellum black; tip short C. oblongus, Packard. 



%. Middle femora rufous C. trapezoides, Packard. 



E. Abdomen subpedunculate, basal ring being longer and slenderer 

 than usual. 



a. No fascia: on the third abdominal ring. 



%. Body black; abdomen 4-spotted C. paucimaculatus, Pack. 



^. Head very cubical ; basal joint of abdomen subfili- 



form ; front of head golden C. auriceps, Cresson. 



% . Abdomen 6-spotted, with a terminal linear band; 



fore femora rufous. 9 • Body stout; fore femora 



black; abdomen 6-spotted C. 6-maculatus, Say. 



b. -4 lateral spot on third abdominal ring. 



% 9. Fore femora tipped with yellow C. trifasciatus, Say. 



