BEMBIDIINJE 81 



in cad HC urn; head and prothorax nearly as in the preceding, except 

 that the latter is a little shorter, nearly one-half wider than long, 

 with the basal angles, though sharply defined, evidently more than 

 right; elytra nearly similar but only two-fifths wider than the pro- 

 thorax and with the side margins less broadly reflexed. Length (cf ) 

 3.75 mm.; width 1.3 mm. A single specimen from the Levette col- 

 lection, apparently from Colorado petulans n. sp. 



67 Elongate, subparallel, very depressed, as much so as in any of the 

 planatum group, shining, piceous-black, the elytra testaceous, black- 

 ish toward tip; under surface piceous, the abdomen rufous, with 

 the segmental apices blackish; head large, with broad and deep 

 sulci and moderately prominent eyes, five-sixths as wide as the pro- 

 thorax and distinctly wider than an elytron; antennae fuscous, paler 

 basally, as long as the elytra, the medial joints three times as long 

 as wide; prothorax virtually flat, with broadly reflexed side margins, 

 distinctly narrower at base than at apex, two-fifths wider than long, 

 the sides somewhat prominently rounded just before the middle, 

 thence feebly arcuate to the rounded apical angles, oblique posteriorly, 

 becoming subparallel in more than basal sixth, the angles nearly 

 right, sharp; surface with wave-like rugulosity toward the fine in- 

 complete stria, the impressions moderate; foveae large, rugose and 

 very shallow, the carina not evident; elytra three-fifths longer than 

 wide, two-fifths wider than the prothorax, parallel, the sides very 

 rapidly rounding at the humeri; striae coarsely and deeply impressed, 

 entire, the punctures fine and especially very feeble; seventh stria 

 obsolete; foveae near two-fifths and three-fourths. Length (9) 5.2 

 mm.; width 1.75 mm. New York (Ithaca). One example. 



grandiceps Hayw. 



My representatives of guadrulum are so much smaller than Le- 

 Conte's type, "from east of Fort Colville" 5 mm. that I am by 

 no means certain that they properly belong to that species. It is 

 evident that there are a number of specific modifications of the 

 qiiadrulum type of Peryphus in the northwestern regions, of which 

 two are here described. Umbraticola resembles the New Mexican 

 recticolle, but has the elytral punctures as remote as in qiiadndum. 

 The original description of recticolle is given above, as I have no 

 authentic example at hand. 



As a probable abnormality, the complete absence of the anterior 

 dorsal fovea? in the male type of callidum is to be noted ; the usual 

 two are present in the female. In one of my specimens of dilatatum 

 Lee., it is the posterior fovea that is similarly wanting. A case will 

 be noted further on, under Notaphus, where the middle of the three 

 fovea; in consimile Hayw., is completely obsolete, and there is an- 

 other instance before me under Isotachys omissus, where the anterior 

 T. L. Casey, Mem. Col. VIII. Oct. 1918. 



