420 Messrs. T. D. A. Cockerell and W. Porter on Bees. 



margin ; aiitennse brown, scape and lower part of flagelluni 

 dark brown or black; wings without black tips, clear 

 llirougliout, apices not quite so produced, marginal cell not so 

 long and nanow; legs black ; liair at apex of abdomen dirty 

 white. 



Uoh. Las Vegas, New Mexico, at flowers of Chamcesaracha 

 coronopus, Aug. 1 to 4 [CklL ^ W, Porter). 



IIalictoides, Nyl. 



The type of this genus is H. dentiventris. Various species 

 assigned here present considerable structural differences, as 

 follows : — 



(A) Labial palpi with joint 1 longer than the 



other three together ; joint 2 not one 

 fourth the length of 1 ; abdomen of S 

 toothed at sides beneath. {Halidoides, 

 8. sir.) dentiventris, Nyl. 



(B) Labial jialpi with joint 1 not nearly so long- 



as tlie other three together ; joint 2 about 

 three quarters length of 1 ; galea rather 

 long ; abdomen of S simple, except that 

 the last Aentral segment has a longitu- 

 dinal keel. (Epihulutoide:^, subgen. nov.) . murginatus, Cresson. 



(C) Labial palpi with joint 1 rather shorter than 



iho other three together; joint 2 about 

 half the length of 1. {ParahaUetoides, 

 subgen. nov.). 



(1) Shortest joint of maxillary palpi less than 



half the length of the longest ; joints 1 



and 2 large, the others small Tinslcyi, Ckll. 



(2) Shortest joint of maxillary pa'pi more than 



half the length of the longest. 



(«) Head in J transversely oblong; abdo- 

 nun of (5 with a subapical ventral 

 tuft campannl(B, Ckll. 



(b) Head in c5' longitudinally oblong; abdo- 

 men of cJ without a subapical ventral 

 tuft parado.vuit, Moraw. 



II. cavrpamdce may be taken as the type of Paralialictoides. 



Hemihalictus, Ckll. 



Ashmead has referred this to Dvfourea^ but the mouth- 

 parts are widely different, as follows : — 



IhvnhaUctvs lustrans (Ckll.). — Tongue short, broad at base; 

 paraglossai broad, much more tiian half the length of the 

 tongue ; galea broad and thin, notched within, the apical 

 portion beyond the notch with large bristles ; first joint 



