Dec., '05] ENTOMOLOGICAL NEWS. 33 1 



A New Bee of the Genus Perdita From Texas. 



BY T. D. A. COCKERELL. 

 Perdita xanthismae n. sp. 



9- Length a little over 5 mm ; head and thorax dark shining green,, 

 with the light markings a very pale yellowish or ochreous ; abdomen 

 broad, deep honey-color, either without any distinct markings, or with 

 brown sublateral spots on the segments, connected by obscure nebulous 

 bands. Tongue long ; first joint of labial palpi long, about or nearly 

 twice as long as the other three combined ; maxillary palpi 6-jointed ; 

 mandibles, labrum, clypeus, lateral face-marks (broad below, ending in a 

 five point on orbital margin a little above level of antennae), dog-ear 

 marks, and a small transverse supraclypeal mark (sometimes evanescent) 

 all light yellowish ; cheeks simple, very hairy ; front shining ; antennae a 

 sort of pale orange, flagellum dark brown above except at tip ; thorax 

 with much white hair ; mesothorax shining ; upper margin of prothorax, 

 and tubercles, light yellowish, below this the prothorax is mainly brown ; 

 pleura dark ; tegulae hyaline ; wings rather milky, stigma and nervures 

 colorless ; second s. m. rather large, nearly an equilateral triangle, a little 

 cut off at the top ; second r. n. distinct, meeting second t. c. ; femora 

 dark except at apex ; tibiae and tarsi light yellowish, the tibiae more or less 

 darkened ; claws simple. The first abdominal segment may be brown 

 with a light band, interrupted in the middle. 



Hab. Goldthwaite, Texas, September 4, 1905, at flowers of 

 Xanthisma tc.vaunm, D. C., collected by Mr. J. C. Crawford, 

 who states that the species is found in various parts of N. 

 Texas. 



The following table separates the above species from those 

 which most resemble it : 



Vertex and mesothorax nude; very small species ; face-markings white 



in j\ none in 9 semicrocea Ckll. 



Mesothorax more or less hairy, usually strongly so . . . i. 



1. Anterior femora yellow ; males 



Anterior femora dark, or mainly so .... 



2. Nervures brown ; face bright yellow . rhodura Ckll. 

 Nervures colorless sidae Ckll. 



3. Stigma with a brown margin ; abdomen bright apricot-color. 



chamaesarachae Ckll. 

 Stigma with no brown margin ; abdomen not so brightly colored . . 4. 



4. Face-marks white, lateral marks not attenuated above (Arizona). 



mellina Ckll 

 Face-marks light yellowish, lateral marks attenuated above. 



xanthismae Ckll. 



