T. D. A. COCKERELL. 167 



(C. H. T. Townsencl). The pubescence of the head and thorax is 

 rather pale ocliraceous than grayish, and the abdomen has scattered, 

 very minute punctures, visible with a compound microscope. It is 

 possible that the specimen represents a species distinct from lusorius, 

 but Cresson's description so nearly fits it that the identity may be 

 assumed until the contrary is proven. 



(2.) Males. 



(a.) A transverse yellow patch on lower part of clypeus, antennae 

 very long. 

 Hal ictus angtistior n. sp. ( 9 supra) 



What I suppose to be probably the S of angustior differs from 

 the 9 by its slender form, very narrow subcylindrical abdomen, 

 very long antennae (which are wholly dark), transverse yellow patch 

 on lower part of clypeus, narrower face, mesothorax more shining 

 and sparsely punctured. Wings clear, metathorax with a more 

 elevated rim round the enclosure. Abdomen without hair bands. 

 One specimen on Bhus, Rnidoso Creek, New Mex., 6600 feet, July 

 10 (E. O. Wooton, 172). The teguhe, stigma and nervures are all 

 dark piceous, practically black. 



(b.) Clypeus wholly dark. 



a. Abdomen long and cylindrical, strongly punctured ; stigma 

 brown. 

 Halictus sp. 



In the shape of the abdomen this reseml)les much the supposed % 

 of angustior, but it is a smaller insect, with much shorter antennae, 

 face covered with white pubescence below the level of the antennae. 

 I cannot identify it with anything described, but defer a name and 

 full description in the hope of obtaining the 9 • Tbe tegulae are 

 testaceous. 



Hab. — Santa Fe, New Mex., July 16, on white umbelliferous 

 flovvers, and August 2 on Clematis ligustieifolia (Ckll. 1481, 4056). 

 Ruidoso Creek, New Mex., 6400 feet, July 8, on Asclepias (E. O. 

 AVooton, 94). 



/S. Abdomen not so long and narrow, stigma darker, 

 i. A small species with a hoary face. 



Halictus pectoraIoi<les Ckll. ( 9 supra). 



What I have supposed to be the %> of peetoraloides differs by its 

 smaller size, much moi-e slender build, punctured abdomen, and dark 

 se})ia-brown flagellum. The metathorax is very shiny ; the teguhe 

 are piceous with a testaceous spot ; the antenme are only moderately 

 long. I felt sure that this was the real S of pectondoides until I 



TRANS. AM. ENT. SOC. XXIV. JUNE. 1897 



