1902.] NATURAL SCIENCES OF PHILADELPHIA. 79 



to apex, first and gecond entire, fiftli slightly grooved at tip; 

 intervals flat to feebly convex, the third Avith first doi-sal puncture 

 a little more than one-third from base, the second three-eighths from 

 apex. Beneath blackish. Legs rufo-piceous. Length 3.5 mm. 



Anterior tarsi of male with first two joints dilated, the first 

 strongly so, slightly oblong ; second but feebly dilated, inner ante- 

 rior angle not noticeably produced; other joints stouter than usual. 

 Female tarsi with joints stouter than usual. 



Diagnostic characters. — The scarcely converging frontal grooves, 

 the outer nearly entire, and extension on to the epistoma, with 

 dorsal punctures two, situated on the third interval, place this species 

 in Group XVI of Mr. Hay ward's classification. Sufficient has 

 been stated in this paper to render this species easily separable from 

 sulcatum, the only other member of the group. 



Described from several specimens collected in Eldorado county, 

 Cal., by my friend. Dr. Edwin C. Van Dyke. . 



All comparative measurements have been made from camera 

 lucida outlines. 



In attempting to give the diagnostic characters, I have confined 

 my remarks merely to the species most closely related to those 

 under consideration, as reference to Mr. Hay ward's synopsis of 

 group characters will aid in apj^roximately placing any form here 

 described. 



EXPLANATION OF PLATE III. 



Fig. 1. — Bemhidium sulcatum. Group XVI (Hayward). 

 Fig. 2. — Bembidium hifasciatum. Group XIII (Hayward). 

 Fig. 3. — Bembidium 4-maculatu7n, Group XIV (Hayward). 

 Fig. 4. — Bembidium anguliferum, Group XVII (Hayward). 

 Fig. 5. — Bembidium affine. Group XV (Hayward). 

 Fig. 6. — Bembidium dubitans, Group XIV (Hayward). 

 Fig. 7. — Bembidium conci/imim n. sp., Group XVI (Hayward). 

 Fig. 8. — Bembidium vile, Group XII (Hayward). 

 Fig. 9. — Bembidium assimile. Group XVll (Hayward). 

 Magnified 28.5 diameters. 



