366 Mr. 'T. D. A. Cockerell—Descriptions and 
coxe with rather short sharp spines; spurs dark brown. 
Abdomen shining, with entire transverse sulci at bases of 
second gnd third segments ; first segment with short black 
hair, the following with thin pale pruinose pubescence, the 
broad margin of fourth, and fifth and sixth entirely, densely 
covered with very bright ochreous felt-like tomentum ; sixth 
segment with a pair “of parallel acute red spines ; ventral 
segments beyond the first with ochreous hair-bands. 
Zaruma, Ecuador, October 1915 (F. W. Rohwer). 
This belongs to a section or subgenus which was first made 
known by Spinola in 1853, when he described J/. wanthura 
from Parad. Spinola had only the female, but Vachal, in 
1908, briefly described what he considered to be the male 
from French Guiana, Ecuador, and Bolivia. In the same 
year Schrottky described a close relative as M/. bertonii from 
Parag guay, and in 1913 he suggested that Vachal’s male was 
not the true vanthura, but bertonii or closely related to if. 
Finally, Friese, in 1916, described AZ. ranthura, var. brunnei- 
pennis, from Costa Rica and Peru, querying whether it might 
be identical with bertonwz. The short description appears to 
confirm this idea. 
M. mterosoma, Ckll., 1912, from Brazil, is very close to 
M. bertonu, differing in the pure white hair’ fringing clypeus, 
the fewer punctures in middle of clypeus, the more shining 
mesothorax, and the more acute and equilateral teeth at end 
of abdomen. The JZ. bertonii compared was received from 
Schrottky. M. diodontura differs from these species by the 
orange-tinted wings, red teeth or spines at end of abdomen, &e. 
M. bidentis, Ckll., from Mexico, is of this alliance, and has 
wings coloured as in M. dtodontura, but the teeth at end of 
abdomen are very short, triangular, and black. JZ. auranti- 
pennis, Ckll., from Guatemala, has no coxal spines, apical 
spines of abdomen black, &e. 
Halictus distinctus, Walker, 1871. 
9? .—Type in Brit. Museum. 
Wady Genneh. 
Hair-bands on apical margins of abdominal segments; 
third s.m. very broad above, first rn. joining second s.m. 
some distance before end; area of metathorax entirely dull, 
minutely rugose in middle, at sides with fine plice; head 
broad, almost circular seen from in front; hind spur with 
minute teeth. 
