THE BLACK HALICTINE BEES OF THE 
' PHILIPPINE ISLANDS 
By T. D. A. Cockerell 
Of the University of Colorado 
The black halietine bees of the Philippines have all been 
referred to the genus Ealictus; but the subgenus Nesohalictus, 
of Crawford, remarkable for its very long tongue, may be ele- 
vated to generic rank. 
Genus NESOHALICTUS Crawford 
Halictus subgenus Nesohalictus Crawford, Proc. U. S. Nat. Mus. 38 
(1910) 120. 
“Closely resembles Halictus, but differs by the greatly elongate tongue, 
which is about as long as the antennas, by having the inner spur of the 
hind tibiae in the male armed with a few large teeth, and by having all 
the transverso-cubital veins, the cubitus beyond the second transverse 
cubital, and the upper two-thirds of the second recurrent vein, obsolescent.” 
(Crawford.) This diagnosis was based on the male. 
The female is larger (about 7.5 millimeters long), with the 
basitarsi piceous (they are ferruginous in the male) ; the hind 
spur has long spines. On account of the long linear tongue the 
genus is related to Thrinchostoma, but it differs in the struc- 
ture of the hind legs, the absence of the hair patch on the wings 
of the male, and in other ways. The clypeus of the male is en- 
tirely black, flattened and shining in the middle. 
Nesohalictus robbii (Crawford). 
Halictus ( Nesohalictus ) robbii Crawford, Proc. U. S. Nat. Mus. 38 
(1910) 120. 
Luzon, Manila (M. L. Robb and R. E. Brown) : Laguna 
Province, Mount Maquiling (C. F. Baker), Los Banos {Baker). 
Panay, Antique Province, Culasi ( R . C. McGregor) , June, 1918; 
Maralison Island {McGregor) , June 18, 1918. Mindanao, Da- 
pitan, Davao, and Cagayan (Baker). Another species of this 
genus, Nesohalictus lativentris (Halictus lativentris Friese), 
occurs in Java. 
Genus HALICTUS Latreille 
The metallic species have been previously described, but one 
described below (H. opisthochlorus) is partly metallic. The 
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