from the Mesilla Valley, yew Mexico. 399 



hairs ; colour of head dark green, face below antennas wholly 

 bright lemon-yellow, the yellow sending a short rather broad 

 projection upwards in the median line, and laterally extending 

 to the same level on the orbital margin, just to the lower end 

 of the anteorbital pit, broadly, obliquely truncate as in affinis. 

 A small projection passes from the lateral marks over the 

 bases of the antennae. Cheeks dark, but a narrow yellow 

 stripe passes halfway up the orbital margin. Vertex very 

 distinctly granular. Scape yellow, with a black stripe above; 

 funicle yellow below, black above ; flagellum dark brown, 

 more or less yellow beneath. Thorax dark green, minutely 

 sculptured and rather dull ; metathorax dark blue. The 

 metathorax may be also green, but then of a bluer green 

 than the mesothorax. The pleura may become bluish. 

 Mesothorax with sparse punctures, parapsidal grooves 

 distinct. Pubescence of thorax sparse, tinged with ochreous 

 on dorsum. Legs black; knees, stripe on anterior femora, 

 anterior and middle tibite and tarsi in front yellow. Tubercles 

 and two patches on hind border of prothorax yellow. Pleura 

 wholly dark. Wings hyaline, iridescent, nervures and 

 stigma dark sepia-brown ; stigma hyaline in middle, third 

 discoidal cell distinct ; marginal cell appendiculate, its post- 

 stigmatal portion about as long as the substigmatal ; second 

 submarginal narrowed about half to marginal. Abdomen 

 piceous, with bright yellow clean-cut bands, interrupted in 

 the middle, on the first three segments. The degree of 

 interruption is variable and the band on the third segment 

 may be reduced to two narrow stripes. Extreme tip of 

 abdomen orange-brown. Venter dark. 



Hah. Three males on flowers of Erigeron divergent (det. 

 E. O. Wooton) at the Woodlands Orchard, Mesilla, N. M., 

 iAlay 9, 1896. 



This greatly resembles the male of P. affinis, but is smaller 

 and undoubtedly distinct. I am now persuaded that what I 

 considered to be the male of P. rectangulata really belongs 

 to affinis. P. erigeronis also resembles P. fallax, but that 

 has white abdominal marks. It is, moreover, a vernal species, 

 while /a//aa:, affinis, and other allied forms are autumnal. 



On the Erigeron, at the same place and time, 1 took one 

 Augochlora pura, iSay, $ , and an Halictus. 



Podalirius Lesquerellce, sp. n. 



J . — Length about J 4 millim. ; width of abdomen 5 millim.j 

 length of anterior wing 8^ millim. 



(Stoutly built, black, the pubescence short, close, delicate 



