54 ENTOMOLOGICAL NEWS. [Feb., '07 



brown, the segments broadly edged with testaceous. Pubescence all 

 pure white, longest on cheeks, pleura and tip of abdomen. 



0". — Length 5.5-6 mm. — A streak contiguous to lower half of posterior 

 orbits, mandibles, labrum, whole of face up to one-third the distance 

 between insertion of antennae and anterior ocellus, and farther laterally, 

 whole of antennae except a dorsal spot on pedicel, a line on prothorax 

 connecting with the spot on tubercles, four anterior legs except broad 

 lines on tibiae and femora behind, posterior coxae, trochanters, femora 

 in front and all the knees, bright yellow. Abdomen with yellow bands 

 in middle of 1 and bases of 2-5, broader than in $, usually all medially 

 interrupted or notched, the last ones broadly so, segment 6 dark, 

 venter pale yellowish. Otherwise like the ?. Head round, face and 

 whole of thorax hairy. 



Types: Neligh, Nebraska, August 7, 1901, on Helianthus 

 (M. Cary), 9 $ . 



Paratvpes: 14 $ $ ; type lot, 9 S ; type locality, July, 3 

 $ ; Niobrara, Nebraska, August 13, 1902, on Helianthus (W. 

 D. Pierce), 2 $ . 



This species is most closely allied to the recently described 

 P. dallasiana Ckll., but differs from that species in larger size, 

 deep yellow of face, less yellow on cheeks, no yellow marks 

 on pleura and different abdominal markings. It looks much 

 like P. sphaeralceae Ckll., especially the abdomen, but the head 

 and thorax are quite different. The female runs in the tables 

 to P. bigeloviae var., but is not that species. 



5. Perdita dolichocephala n. sp. 



9. — Length, 6 mm. — Head and mesonotum dark metallic green, 

 strongly and densely punctured, the prothorax, metathorax and pleura 

 dark metallic blue and much more finely punctured. Face unusually 

 long and narrow, with the inner margins of the orbits subparallel. 

 Gypeus very sparsely and shallowly punctured, typically with a large 

 median subpyriform area and lateral margins expanding into a spot 

 in the lower corners, pale creamy yellow, but sometimes entirely 

 black. Typically, also, with yellow lateral face marks running up along 

 the orbits to terminate truncately at level of antennae and below 

 swollen into a large spot, but these also sometimes lacking. Mandibles 

 usually yellow, sometimes black, labrum always black. Antennae 

 dark, sometimes yellow for a short distance at extreme base. Teguhe 

 pale, the wings clear and with pale nervures and stigma. Legs blackish 

 except the anterior knees and inner surface of anterior tibiae, which 

 are yellow. Abdomen varying from black to brownish-black, the bases 

 of the first three segments typically with two short yellow marks, one 

 on each side, marking the rudiments of a semi-obsolete, widely inter- 



