298 PROCEEDINGS OF THE ]S"ATIOXAL MUSEUM vol.84 



42. EXETASTES CONCOLORIPES, new species 



Tliis may prove to be only a color variation of erythrogaster, but 

 the limited material at hand shows no intergradation. 



The only dilferences appear to be those of color, the present species 

 having the legs entirely black and the black color of the abdomen in- 

 volving most or all of the second tergite, and in a paratype male most 

 of the third and part of the fourth. 



Type locality. — Colorado. 



TVpe.— U.S.N. M. no. 51822. 



Paratype. — Canadian National Collection. 



Remarks.- — One female (in poor condition), the holot3'pe, from the 

 C. F. Baker collection; the allotype male from La Grande, Oreg., 

 2,800 feet. May 12, 1930, H. A. Scullen; and one paratype male from 

 Waterton Lakes, Alberta, June 19, 1923, J. McDunnough. 



43. EXETASTES COLORADENSIS, new species 



Differs apparently only in color from concoloripes, the abdomen being 

 entirely black except in the sutures, where it is reddish piceous. 



Like concoloripes this may be a color phase of erythrogaster, but it 

 seems best until more material is available to treat it as a distinct 

 species. 



Type locality. — Colorado. 



Type.—U.^.^.M. no. 51823. 



A single female taken by C. F. Baker. Both antennae are broken. 



44. EXETASTES AFFINIS Cresson 



Plate 16, Figure 10; Plate 17, Figure 41; Plate 18, Figure 62 



Exetastes affinis Cresson, Proc. Ent. Soc. Philadelphia, vol. 4, p. 277, 1865; 

 female. 



This and the next following species are very similar in general form 

 and color to those of the zelotypus group, but are at once distinguish- 

 able by the long slender legs and antennae, shorter clypeus, and 

 convex cheeks. 



The male referred to this species and described by Provancher ^ 

 certainly does not belong here, nor am I able to recognize it from his 

 description as referable to any species known to me. I strongly suspect 

 that it is not an Exetastes. 



Female. — Length 13 mm, antennae 12 mm. 



As in zelotypus, except pubescence of head and thorax much shorter 

 and less conspicuous; cheeks in front view convex, their extended 

 angle nearly right; malar space barely half as long as basal width of 

 mandible; clypeus little more than half as long as broad; mandible 



' Petite faune entomologique du Canada . . ., vol. 2, Hymfin., p. 385, 1883. 



