NEW AMERICAN BEES. 177 



Allied to p. fusciformis, Sauss. Judging from Saussure's 

 figure of that species, the present has both the temples and 

 pronotum more largely developed than in P. fusciformis or P. 

 novarce, Sauss. Orange-yellow antennae appear to be not un- 

 common with Australian Pompilidee. 



NEW AMEEICAN BEES.— 11. 



By T. D. a. Cockerell. 



Perdita jonesi, n. sp. 

 Runs in my tables to P. octomaculata and affinis, and is very 

 closely allied to them, differing as follows : — 



? . Length, 5^-6 mm. ; head and thorax dark blue-green, abdomen 

 brown-black, with oblique chrome-yellow marks on sides of first four 

 segments. It is a little smaller than octomaculata, the abdominal 

 markings are smaller, the prothorax is without yellow spots, and the 

 tubercles are either all dark or with minute yellow dots ; the tegulse 

 are smaller, and light reddish brown instead of hyaline with a yellow 

 spot; the wings are smoky and iridescent, with dark (solid brown) 

 stigma and nervures ; the outer border of the third discoidal cell is 

 longer, and the marginal cell seems a little longer ; the yellow of the 

 front legs is reduced ; the face is narrower, the black bars on the 

 clypeus are much heavier, and the lateral face-marks are reduced, 

 being subpyriform, pointed above. From P. ajfinis it is readily known 

 by the longer and narrower marginal cell, the chrome-yellow abdo- 

 minal spots, the unspotted prothorax, and the smaller lateral face- 

 marks. 



J . Length scarcely 5 mm. ; lateral face-marks rounder and less 

 pointed above ; abdomen spotted only on second and third segments. 

 Runs in my tables to P. ajfinis, but the face-marks would agree better 

 with the female than the male of that species, and even for that sex 

 the lateral face-marks are much too small, and the black on the clypeus 

 is much too heavy. The anterior femora, instead of being entirely 

 yellow in front, are yellow only at the knees, while the middle and hind 

 femora and tibiae are not striped with yellow as they are in affinis. 



3 , var. a. Similar, but the abdomen has yellow (reddened by 

 cyanide in type) spots on the first five segments, the tubercles have a 

 yellow spot, the lateral face-marks are much larger, the clypeus is 

 yellow without well-defined black bars, and there is a subquadrate 

 yellow supraclypeal mark. There are even minute dots representing 

 the dog-ear marks. The knees are all yellow, and the anterior and 

 middle tibiffi have heavy yellow stripes. 



Hah. Hosser, Texas, June 7th, 1905; female (=type) and 

 male taken by Mr. F. C. Bishopp at flowers of Monarda citri- 

 odora, and female and male, var. a, taken by Mr. C. R. Jones 

 at flowers of Parosela (?). The male var. a may possibly be a 

 distinct species, but the female taken with it agrees with the 



