364 MEMOIRS ON THE COLEOPTERA 



and I think there can be no doubt that percheroni and cicatricosus 

 of Westwood, as denned and figured by the author, are the same as 

 variolosus, but there may be some question as to whether or not 

 there may be several species closely allied to the latter. I do not 

 think, for instance, that figure 7, on plate 14 of the "Thesaurus," 

 representing Westwood's conception of variolosus and figure 9, of the 

 same plate, representing cicatricosus Westw., could have been 

 taken from individuals of the same species, unless drawn with 

 extreme carelessness. Again the small notch of the mentum is well 

 formed and distinct, though circularly rounded, in Westwood's 

 specimens as figured, while in my North Carolina examples of 

 variolosus, described above, the notch is subobsolete and there is 

 barely a vestige of it so feeble, in fact, that if it were not known 

 that variolosus possessed a small notch in that particular position 

 on the limb of the mentum, it would never be noticed. It is quite 

 possible that the feeble clypeal carina of cribripennis , defined above, 

 may be to a great extent an adventitious character in the single 

 type example, and the species would never have been founded upon 

 that feature alone; it is abundantly distinct in other ways, as for 

 example in the tumid upper limits of the elytral flanks, coarse 

 sculpture, very depressed surface and in other characters. In 

 one of my examples of westwoodi there is a very singular mutilation. 

 Just before each of the hind angles of the prothorax there is a large 

 deep acute notch, with its anterior outline transverse to its inner 

 angulation and from there outward evenly and sinuously oblique; 

 the posterior part of the true thoracic angles therefore projects 

 obliquely in a thin process. This is evidently caused by a part of 

 the edge, just before the angles, being chipped out, possibly while 

 in an immature state by the mandibles of ants, and would not be 

 mentioned here were it not for the fact that the notch is exactly 

 similar on both sides; it is the almost complete bilateral symmetry 

 that is so remarkable. Pugetanus, described above, was assumed 

 to be a larger flatter form of knochi by Horn, but is a very distinct 

 species, more closely allied to crinitus, by reason of habitus and the 

 very long erect hairs seen in perfect specimens.* 



* As indicating that the habits of the species of this genus are not always inti- 

 mately associated with ants, the following statement of Mr. Knaus, referring to 

 nitens, is interesting: 



" Cremastocheilus nitens is found almost every season during the hottest part of the 



