162 THE CANADIAN ENTOMOLOGIST. 



yellow, with the hind margins broadly light reddish, except the basal 

 segment, which is black, with a large yellow mark not unlike a buffalo- 

 skull in shape. 



Hab. — Boulder, Colo., June ii, 1905. (W. P. Cockerell.) In many 

 resi)ects this agrees with the description of N. flavipes^ Provancher, but I 

 have supposed that to be really a Micrononiada. Should flavipes prove 

 to be a Xanthidiiun, it will be separated from N. ornithica by its larger 

 size, yellow ])osterior orbits, yellow of scutellum reduced to two spots, 

 darker wings, etc., but it is known only in the female, and the male might 

 show more resemblance. In my table of Rocky Mountain Noiiiada^ N. 

 ornithica runs to N. civilis, vvhich it closely resembles in general appear- 

 ance, but it is easily known from civilis^ by the broad short lateral face- 

 marks, the much more parallel orbits, the longer fourth antennal joint, etc. 

 In my XaiitJiidium table (Proc. Phila. Acad., 1903, p. 580) it runs to N. 

 pascoensis, but differs in the lateral face-marks, much less red on legs, etc. 



Aiigochlora fervida. Smith.— Boulder, Colo.; 2 9 's, June 4 and 10, 

 1905. (W. P. Cockerell.) Mr. Titus does not credit this species to 

 Colorado in his article in Can. Ent., May, 1901. Our specimens have 

 the hind spur with four spines, except that one has only three on one side. 

 They differ from A. hunieralis in having the first four ventral segments 

 of abdomen green, but it is doubtful whether huineralis is really a distinct 

 species. In Mr. Vachal's recent paper (Misc. Entomologica, 1903-4) the 

 species of AugocJiloi-a are referred to Halictus, and Jiuvieralis^ being 

 preoccupied in that genus, is changed to Pattoni. However, the descrip- 

 tion of Pattoni given by Vachal does not accord with hunieralis ; but, 

 excei)t for certain characters (colour of tibiae and tarsi, 4 spined spur) of 

 the legs, suggests A. ccerulea, Ashm., and a specimen is cited from Fort 

 Lupton, Colo., which must be one of those already recorded by Titus as 

 cceriilea. On the other hand, I feel reasonably sure that the Texas 

 material oi chorisis, Vachal, must have ht^Vi fervida. 



Sphecodes etistictus, n. sp. — 5 • Length hardly 6 mm. A Sphecodiu^n 

 (this hardly seems a distinct genus), allied to and closely resembling S. 

 Cressoniiy Rob., or S. mandibiilaris, Cress, (these are probably not 

 distinct species), but very easily distinguished from these by the con- 

 spicuously punctured second abdominal segment. 



Labrum not emarginate ; mandibles ferruginous ; antennal joints 3 



and 4 both very short, and of about the same length ; punctures of vertex 

 strong and dense ; of clypeus very large but sparse ; mesothorax shining, 

 with large, distinctly-separated punctures ; teguhe pale testaceous ; area 



