450 [June 



scutellurn rugose; enclosed space of metathorax black, sometimes cine- 

 reous on the middle, with very fine dense oblique striae ; tegulae fer- 

 ruginous. Wings hyaline, the nervures fuscous, ferruginous at base, 

 the apical margins slightly dusky. Legs ferruginous, slightly prui- 

 nose ; the four posterior coxa?, trochanters, and femora above, and some- 

 times their tibia? within, black. Abdomen ferruginous, slightly prui- 

 nose ; the first segment above, the fifth more or less, and sometimes the 

 petiole above, black; beneath entirely ferruginous. Length 7 — 8> 

 lines; expanse of wings 8 — 10 lines. 



Male. — Resembles the female, but is more slender, the thorax more 

 hairy, the face narrower and bright silvery, the clypeus, mandibles, 

 palpi and antennas entirely black, the legs more pruinose and with the 

 black on the femora more extended, the tarsi blackish towards the 

 tips, and the petiole entirely, the first segment above, a line on the 

 basal third of the second segment above, and the two or three apical 

 segments entirely, black. Length 6^ — 8 lines; expanse of wings 

 6| — 8J lines. 



Ten 9 , three % specimens. The pile on the thorax is sometimes 

 very brilliant. 



3. Ammophila collaris, n. sp. 



Ferruginous ; head, mesothorax, pleura, disk of metathorax, tarsi and apex 

 of abdomen, black ; wings hyaline. 



Male. — Ferruginous; head black, the face rather broad, and densely 

 covered with silvery pile ; clypeus emarginate ; mandibles ferruginous, 

 black at tips; palpi luteous, the basal and terminal joints dusky; an- 

 tennae black, the basal joint reddish at tip beneath. Thorax : protho- 

 rax transversely aciculate, ferruginous, with a triangular black mark 

 on the anterior middle superiorly ; mesothorax transversely striated, 

 black, with a ferruginous mark on each side over the tubercles; scutel- 

 lum black, longitudinally striated ; tubercles ferrugiuous and covered 

 with dense whitish pile ; pleura blackish, densely cinereous-pruinose ; 

 metathorax ferruginous, also cinereous-pruinous, the enclosed disk black 

 and covered with dense, fine, oblique striae ; tegulae ferrugiuous. Wings 

 hyaline, the apical margins dusky. Legs ferruginous, slightly pruinose ; 

 the four posterior coxa? and trochanters behind, a line on their femora 

 above, and all the tarsi except extreme base, black. Abdomen slender, 

 ferruginous, base of the first segment, and the two or three apical seg- 

 ments, black. Length ~h lines; expanse of wings 7 lines. 



One specimen. A beautiful and distinct species. 



