EXPEDITION TO SOKOTRA ! NEW SPECIES, 21 
segment with a mere trace of these. Mandibles, tongue, tegule and legs more 
or less rufous; femora blackish, except at top; pile on undersurface of 
abdomen yellowish brown. Wings smoky hyaline, costal half of radial cell 
clouded. 
Sokotra: Homhil, E. Sokotra (2500 ft., 22. I. 99); one specimen. 
(18) Megachile paucipunctulata. 
Long. corp. 12 mm. ; long. al. ant. 9 mm. 
Female. Head and thorax thickly punctured, but more coarsely than in 
M. punctatissima ; hairy clothing similar ; clypeus slightly convex beneath ; 
labrum set with tawny bristles. Tongue, scape of antenrie beneath, tegule 
and legs rufous. Abdomen with the first segment concave in front, narrow, 
black in front, and red behind, sparingly punctured on the sides; the 
succeeding segments divided into three sections, most distinctly in the second 
and third segments ; first basal, black, very thickly punctured ; second black, 
smooth, and sparingly punctured; and third red, smooth, sparingly 
punctured at base. In the following segments, this is less obvious, the 
width of the thick basal punctuation being much reduced ; and the terminal 
segment is almost wholly black, the punctuation being hidden by short 
bristles. There are five distinct white bands on each side of the first five 
segments ; that of the first segment covers the whole width at its base. 
Undersurface of abdomen dark brown. Wings brownish hyaline, clearer at 
the base. 
Sokotra : Homhil, E. Sokotra (2500 ft.), 22. I. 99 ; one specimen. 
Crocisa, Jurine. 
(19) Crocisa forbesii. 
Long. corp. 10-11 mm. ; long. al. ant. 9 mm. 
Female. Black, with white pubescence on the head, thorax, and upper 
part of the femora and front tibiz, on the rest of the legs it is reddish. The 
mesonotum and scutellum, are, however, almost denuded, and may have 
been spotted. Antenne reddish brown, scape black. Head sparingly 
punctured, mesothorax less thickly than the scutellum, the hinder part of 
which has a tuft of white pubescence, and terminates in a plate, concave on 
each side, and deeply bifid in the middle, Abdomen, with each of the first 
four segments apparently divided in two by a deep suture ; the front half 
is thickly punctured, and the second half smooth. On each side of the 
hinder smooth half of these segments is a broad ivory-white stripe. The 
apical segments are strongly punctured, and clothed with tawny hair. 
Wings iridescent hyaline, clouded at the tips and in the upper part of the 
radial cell ; marginal and postcostal nervures dark brown, only separated by 
slender hyaline streak. 
Sokotra: Hadibu Plain, 16. XII. 96; and Homhil, E. Sokotra (1500 ft.), 
18-27. I. 99 ; three specimens. . 
(20) Crocisa uniformis. 
Long. corp. 10 mm. ; long al. ant. 9 mm. 
Deep inky black, antennz clothed with fine. greyish pile, the tegulie 
reddish in the middle, and the trochanters, femora, and tibie of the four 
hind legs more or less ferruginous, at least beneath. Wings purplish hyaline, 
with some subvitreous spaces just beyond, and around the outer cubital cell 
of the fore-wings ; hind-wings paler towards the base. Marginal area of all 
