154 
Psyche 
[December 
Puncturation: Close and line on vertex and pleura, be- 
coming coarser but close on face and on clypeus; fine and 
close, but shallow and obscure on cheeks; mesonotum and 
scutellum finely rugose ; punctures minute and rather sparse 
on fifth tergum, close and more coarse on sixth. 
Color: Black; tegulse and wing nervures reddish-piceous ; 
flagellum ferruginous; wings subhyaline, faintly clouded 
apically; spurs pale yellow. 
Pubescence: White on face, cheeks, pleura, propodeum, 
legs and basal segment of abdomen; intermixed light and 
dark on vertex, mesonotum and scutellum; very short and 
blackish on the second and following segments of abdomen, 
becoming rather long on the more apical segments, especially 
on the sixth and seventh, the second to the sixth terga with 
entire white apical fasciae, the corresponding sterna with 
very narrow apical fasciae, the discs covered with long thin 
yellowish scopa-like hairs. 
Type. — Female ; Braithwaite Bay, Socorro Island, Revil- 
lagigedo Group (Mexico), May 7, 1925, (H. H. Keifer) 
[Calif. Ac. Sc. no. 4602]. 
Allotype. — Male ; topotypical. 
Paratypes. — 1 $ , 21 $ , topotypical. 
Lithurgus corumbae Cockerell 
Lithurgus corumbae Cockerell, Proc. Ac. Sc. Phil. 53, p. 216, 
1901. 
The specimen described below bears the same data as the 
female described by Cockerell under this name and agrees 
with his description as to size and quite well also as to pat- 
tern of pubescence, allowing for sexual differences. There 
seems little doubt therefore that this specimen represents 
the other sex of the species. 
Male. — Size : Length 7 mm. ; breadth of abdomen 2 mm. ; 
anterior wing 5 mm. 
Structure: Face narrow, eyes slightly converging below, 
clypeus flat, the apical margin straight, labrum simple, with- 
out spines or tubercles, mandibles short, of the usual 3- 
dentate type, supraclypeal area with a pair of obscure low 
tubercles, one below each antenna, lateral ocelli slightly 
