162 C. H. T. TOWNSEND. 



5th ; the female September 5th. All on flowers of Lippia wrightii, 

 the August 29th specimen collected by Professor Cockerell, the 

 others by myself. 



Male and female : related to C. excisus Wied. (Fla., Ga., N. Caro- 

 lina) and rufus Will. (Brazil). DiflTers from Williston's description 

 of excisus (Tr. Conn. Acad, iv, 1882, pp. 380-331) as follows : 



Cheeks with a large brown spot taking up their whole area, except outer poste- 

 rior corner. Proboscis more than twice length of head, head being about 2.5 mm. 

 and proboscis 5.5 nun. Third antennal joint wholly black (female specimen) to 

 distal half black (two male specimens, the other male having it black except red- 

 dish at base). Second antennal joint about as long as third including wliole of 

 style. The second joint of style is large and subtriangular in outline, the en- 

 largement projected inwardly, forming a conspicuous process on inner side of 

 style. The vertex and front are of much the same yellow as face, but the vertex 

 is tinged with reddish, and the front on median line and sides posteriorly is 

 tinged with blackish. Occiput deep reddisli, yellowish on inferior third, orbital 

 line of yellowish pollen extending broatily across below vertex present. Ground 

 color of thorax deep reddish, the black appearing in three heavy vittse, the me- 

 dian one extending to anterior border of thorax between the golden yellow hu- 

 meral spots and being more or less split at posterior end, whic^h continues only to 

 point halfway between transverse suture and scutellum. The lateral vittse ex- 

 tend from humeral spots to point three-fourths or more between transverse suture 

 and scutellum, and are narrowly interrupted at transverse suture. Scutellum 

 same reddish as thorax; metanotum reddish, upper half of disk golden yellow 

 pollinose, lower half blackish, sides of metanotum golden pollinose, excejit that 

 pollen appears faint on upper hollowed half. Narrow lateral border of thorax 

 golden, showing in a line continued back from humeral spots to wing bases. The 

 golden spots of thorax, etc., are apparently as in excisus; in all the specimens ex- 

 cept one male there is a trace of golden pollen on median line on posterior mar- 

 gin of mesoscutum. Abdomen same reddish as thorax, first segment with nar- 

 row anterior margin of black, rest of first segment goldwn pollinose, with silvery 

 on sides; second segment golden pollinose on posterior third or more, extending 

 on to anterior margin of third segment; third segment of male blackish across 

 middle, the black merging insensibly in front into the reddish, but changed ab- 

 ruptly behind into golden pollinose, which takes up posterior third or more of 

 length of segment. Fourth, fifth and sixth .segments of male wholly densely 

 golden pollinose, except that fourth shows the reddish ground color narrowly, 

 sometimes more widely, on anterior margin. Female differs by having third seg. 

 menl without black across middle or only a faint tinge of it, the golden fascia 

 being subarcuate, with posterior border behind it blackish or brown, the latter 

 color thus having arcuate anterior border and being widene<i in middle and 

 tapered laterally ; fourth segment reddish, with rather narrow blackish or brown 

 posterior border, in front of which is narrow golden |)ollinose fascia bulged ante- 

 riorly on median third ; fifth, sixth and seventh segments wholly densely golden 

 pollinose like fourth to sixth of male, but the reddish shows on one side on ante- 

 rior margin of fifth segment, which, by the way, is very short in female and 

 bears on underside a very large and stout i)rocess slightly curved and measuring 

 2 mm. in length. Sixth segment of female about as long as two preceding seg- 



