74 PROCEEDINGS OF THE ACADEMY OF [1896. 



rowly up to level of antennae, dull pale yellowish. The face-marks 

 at sides are abruptly truncate at their upper end, the truncation a 

 little oblique. Supraclypeal and dog-ear marks wanting. Tuber- 

 cles and two spots on hind border of prothorax, pale yellowish or 

 subtestaceous. Wings dull hyaline, iridescent, nervures and stigma 

 rather dark yellowish-brown, stigma centrally subhyaline. Mar- 

 ginal cell large, appendiculate, poststigmatal portion longest. Second 

 submarginal large, narrowed more than one-half to marginal ; 3d 

 discoidal distinct. Tegulse hyaline. 



Legs brown-black, hairy ; anterior femora at ends, and anterior 

 tibise, except a patch behind, yellow; anterior tarsi, middle and 

 hind knees, and much of middle tibise, yellowish testaceous. Hind 

 tibise in the type specimen with a mass of dull orange pollen. 



Abdomen above dull brownish-white ; first segment black at base ; 

 segments 1-4 with broad brown-black bands on their hind halves, 

 these bands not at all interrupted, those on segments 2-3 conspicu- 

 ously thickest in the middle, those on 1-2 joined laterally by a 

 longitudinal line ; 5th segment hairy, with a rudimentary band. 

 Venter brown. 



Hab. — Estes Park, Colorado, August, 1892 (F. H. Snow, No. 



210). One specimen, sent by Mr. Fox. The abdomen may have 



been more brightly colored in life. P. snotvii differs from nitidella 



9 at once by its dull hairy mesothorax; from bigelovice 9 it differs 



in shape of lateral marks of face, as well as in abdomen. 



29. Perdita luteiceps n. sp. 



$ . — Length about 5 mm. Cheeks unarmed. Head moderately 

 large, rounded, somewhat broader than long, deep yellow with dark 

 green markings. There is a spot close to each anterior orbital mar- 

 gin above the level of the antennae (as in pundosignata) , the ocelli 

 are situated on an irregular transverse dark patch, and the occiput 

 is dark, from it also coming a narrow dark stripe toward, but not 

 reaching, the upper end of the eye. Labrum and mandibles yellow. 



Antennae yellow, funicle with a black patch above, joints of 

 flagellum slightly darkened above. 



Thorax dark bronzy -green, very granular, moderately dull, meta- 

 thorax a bluer green. Prothorax yellow except a transverse dark 

 stripe. A transverse yellow patch near hind border of mesothorax, 

 and a little yellow along hind border of scutellura. Pleura hairy, 

 dark with a moderately small yellow patch. Mesothorax hairy in 

 front, nearly hairless behind. 



