1896] NATURAL SCIENCES OF PHILADELPHIA. 65 



elongate mark adjacent to hind border of clypeus, narrowing medi- 

 ally, and a triangular patch on each side of face, not quite reaching 

 to level of insertion of antenna, white. Mandibles white with rufous 

 tips. Cheeks rather densely white-hairy. Antennje with the scape 

 black above, white beneath ; funicle and flagellum black or very 

 dark brown, last joint of latter pale at tip. Thorax shiny, rather 

 <lensely pubescent for a Perdita, mesothorax very dark bottle green, 

 median groove very distinct. Tubercles and posterior median border 

 of prothorax white. Tegulse brownish, with a white spot on ante- 

 rior half Scutellum quite brassy-green. Metathorax dark blue, 

 distinctly rugulose. Pleura smooth, dark blue. 



Legs white; with the femora except ends, most of hind coxae, a 

 patch behind each of the four anterior tibise, the hind tibiae except 

 basal third, and the hind tarsi, black. Wings hyaline, nervures 

 fuscous, stigma margined with fuscous. Marginal cell with thepost- 

 stigmatal portion about or hardly as long as the substigmatal ; 

 second submarginal narrowed about one-half to marginal ; third 

 discoidal distinct. 



Abdomen above and below with the last two segments entirely 

 rufous, without markings. Segments 1-3 above white, with black 

 bands at proximal and distal margins of segn'ients, those on proximal 

 margins of segments 2 and 3 very narrow, and that on distal mar- 

 gin of 3d represented only by a line of mottling. (Ckll., 3,262, etc.) 



Mut. 9 . — Clypeus with two longitudinal black lines or bands in 

 addition to the marks above described. (Ckll., 3,259). 



S . — The whole of the face beneath the level of the antennae white, 

 except the two black dots on clypeus. Along the orbits the white 

 is further produced a short distance, rapidly narrowing to a point. 

 Second submarginal narrowed distinctly more than half to marginal. 

 Last three segments of abdomen rufous. Cheeks unarmed. (Ckll., 

 3,261). 



Hah. — Albuquerque, N. M., June 30, 1895, in numbers at flowers 

 of Croton texensis. In August, Miss Myrtle Boyle found a single 

 specimen at La Tenaja, near Santa Fe. I looked for it at Santa Fe, 

 but failed to find it, though the Croton is abundant. 



A small species vith orange or orange-rufous abdomen found on 

 Ch ama'saracha. 



20. Perdita chamsesarachae n. sp. 



S . — 3i mm. long. Head and thorax shining dark blue, abdomen 



