64 PROCEEDINGS OF THE NATIONAL MUSEUM vol.89 



8 (6). Genitalia tips very narrow and strongly reflexed (fig. 12, 



j-0 (Mexico) meadei, new species 



Genitalia pointed and very acute at tip, the tips only 

 slightly reflexed toward sides (fig. 12, a-c) (Arizona and 

 Mexico) cochisa, new species 



9 (5). Dorsal surface covered with moderate!}' dense and short 



hair; antennal club much shorter than funicle; sixth 

 abdominal segment slightly convex (genitalia, fig. 11, 

 l-n) pilosipes, new name 



Thorax and head usually subglabrous; antennal club equal 

 to funicle; sixth abdominal segment very long, either 



foveate or flattened 10 



10 (9). Base of clypeus hardly or not at all tumid, front flattened; 

 thorax polished, densely punctate, not rugose; sixth 

 abdominal segment strongly flattened, never even slightly 

 concave, with fine scabrose punctures, the hairs short and 

 not dense; genitalia in lateral view with only one apical 

 tooth (fig. 5, i~n) miraflora, new species 



Clypeal base always tumid, front always coarsely and 

 usually rugosely punctate; thorax variable, rugosely 

 punctate or not; sixth abdominal segment always broad 

 and either slightly or markedly concave or foveate 

 (never merely flattened as in miraflora), scabrous punc- 

 tures and short erect hairs denser than in miraflora; 

 genitalia in lateral view always with two rather obvious 

 teeth (fig. 5, b, g) 11 



11 (10). All of thoracic disk closely, coarsel}', and rugosely punctate; 



middle base of clypeus stronglj' tumid; posterior margin 

 of transverse carina on vertex very coarsely and closely 

 punctate; genitalia in en /oce-dorsal view with lateral 

 margins of the two teeth nearly parallel (fig. 5, /) ; upper 

 tooth in lateral view of moderate length (fig. 5, e). 



densicoUis (LeConte) 

 Thoracic disk less denselj' punctate, if rugose at all then 

 along the apical margin only, center of disk usually 

 with an impunctate area; transverse carina less densely 

 punctate; genitalia in en face-dorsal view slightly to 

 strongly expanded toward the outside (figs. 5, c, h) ; 

 upper tooth in lateral view either very short (fig. 5, b) 

 or of moderate length (fig. 5, {/) 12 



12 (11). Genitalia in en /ace-dorsal view slightly expanded to- 



ward sides and in lateral view with upper tooth markedly 



shorter than lower (fig. 5, b, c) carminator (Horn) 



Genitalia in en /ace-dorsal view strongly expanded toward 

 sides and teeth much longer than in above species; in 

 lateral view the two teeth are approximately same 



width and length (fig. 5, g, h) michelbacheri, new species 



13 (4). Hind tarsus densely pilose beneath, pilosity of each seg- 

 ment occurring in a dense patch (fig. 4, e); sixth abdomi- 

 nal segment with raised cariniform ridges (fig. 2, d, e) 14 



Hind tarsus pilose but never densely so; sixth abdominal 



usually plane or nearly so 15 



