202 Memoirs on the Coleoptera 



To be known very readily by the short and scarcely linear pro- 

 notal foveae, and differing from laticollis in its relatively shorter and 

 broader elytra, with broad and deeper seventh stria. From 

 striatopunctata it differs in the short pronotal foveae, less coarse 

 and deep and much less punctate elytral striae and relatively larger 

 prothorax. Cliens Csy., is a species of the laticollis group, but 

 differs from the others in the longer third palpal joint, this being 

 almost one-half longer than the fourth, in the more convex elytra, 

 more deeply declivous at the sides, in the deeper and perfectly 

 smooth striae and in the notably larger though not so convex eyes. 

 Planulata, also coming in near laticollis, differs in the flattened 

 dorsal surface of the elytra, gradually laterally and apically obsolete 

 punctureless striae, less deeply incised labrum and in having the 

 prothorax widest behind the middle, the basal angles sharp but 

 much more than right. Of laticollis Lee, I have a specimen from 

 Ottawa and another from Riverside, Illinois; it is easily to be 

 known by the relatively shorter and broader prothorax, much less 

 notably narrower than the elytra than in the striatopunctata group 

 and very nearly twice as wide as long, the elytra rather elongate, 

 with almost smooth striae, not coarser and strongly punctate as 

 they are in striatopunctata, which represents a group having the 

 prothorax relatively smaller than usual. I do not seem to have run 

 across impressicollis Dej.; it certainly is not the same as striato- 

 punctata Lee. Mr. Blatchley has recently (Col. Indiana) placed 

 alternans Csy., as a variety of impressicollis; it has no such rela- 

 tionship, being larger, as well as differing in elytral coloration; 

 impressicollis is only 12 to 14 mm. in length. 



In this genus the head in the female is larger than in the male, 

 as may be noted in many species of Harpalus, Anisodactylus and 

 in some other genera; this sexual difference in the size of the head, 

 probably denoting relatively greater feminine efficiency in this part 

 of animated nature, is very conspicuous in striatopunctata. 



Diplocheila amplipennis n. sp. — Form rather broadly suboval, the 

 head and prothorax relatively small when compared with the elytra, 

 black, moderately shining, with the usual minute surface sculpture; 

 head moderate, three-fifths as wide as the prothorax, the eyes rather 

 prominent; anterior declivous depression distinct but with the foveae 

 rather indefinite; epistomal sinus flatly beaded; labral lobes setose at 

 tip, the right nearly twice as long as the left and much more narrowly 



