ClCINDELID/E AND CARABID/E 9! 



short. Length 23.0 mm.; width 8.7 mm. Mexico (Colonia Garcia, 

 Chihuahua), C. H. T. Townsend *perpolitus n. sp. 



The form identified above as assimilis Lee., is decidedly distinct 

 from sttblcBvis in many ways and may be of specific value. Robustus 

 is almost certainly a true species, differing from strenuus, not only 

 in its smaller size, relatively smaller head and strong elytral sculp- 

 ture, but in the form of the labrum and basal groove of the pro- 

 thorax, both to a rather radical degree and also in its somewhat 

 shorter tarsi; but it is left as a subspecies because the comparison 

 has been made between single specimens, some of the characters 

 mentioned perhaps being inconstant, though it is only fair to say 

 that where large series are at hand of any particular species, no great 

 inconstancy is evident. My two examples representing subsulcatiis 

 Say, differ somewhat; the one from Marion Co., is distinctly 

 narrower than the one assumed to be typical and has much more 

 obsolescent elytral sculpture, this alone being rather indecisive 

 perhaps, but the pronotum is not so flattened near the angles, the 

 lateral bead continuing visibly to the latter. In the former speci- 

 men the four large setigerous fovese of the labrum are all strong, 

 distinct and equal among themselves; in the latter, however, there 

 is no trace whatever of the lateral foveae and the median ones are 

 very small and more advanced in position; the median lobe also 

 is less strongly rounded. No definite conclusion can be formulated 

 from such a character based upon single specimens however, and 

 some others of the labral features mentioned would appear to be 

 individually aberrational; they would be most surprising if con- 

 firmed by series. 



The species of the marginatus group are peculiar in the marked 

 sexual disparity in outline and convexity of the body, this being 

 visible also, though to a slighter degree, in the depressus group. 

 Pimalis is quite distinct from elongatus in its small mandibles, short 

 prothorax and other features, but the four forms angustulus, 

 evanescent, vegasensis and vernicatus are more closely allied, and, 

 although easily differentiated on sight and differing in the structure 

 of the labrum, form of the elytra and other characters, are of rather 

 indeterminate status at present. Although the first two might 

 be considered provisionally as subspecies of elongatus, I should be 

 inclined to consider the last two both as fully valid species. There 



