316 MEMOIRS ON THE COLEOPTERA 



In this genus the size of the body varies between wide limits in 

 nearly all the eastern species, but seems to be more constant in the 

 stout species, which have more nearly the general habitus of Lepto- 

 stylus binstus. The three groups of eastern species allied to punc- 

 tatus, vicinus and alpha are clearly delimited and appear to be well 

 denned natural divisions. Cinereus is amply distinct from alpha, 

 and in fact could not be termed closely allied to Say's species, either 

 in habitus, sculpture or sexual divergencies of size and outline; the 

 very oblique and strongly zigzag fasciae and coarse, very conspicuous 

 punctures of cinereus, will at once distinguish it; I received a good 

 series from Mr. Frost. Mimeticus is by no means closely related 

 to crassulus; a note which I made on inspecting the type of the 

 latter species, reads that the tips of the elytra are rounded, which 

 however possibly means that the narrow truncature is limited by 

 rounded angles, and that the vestiture is very short, not as long as 

 in honstoni or mimeticus. Crassulus has its type locality, in Lower 

 California, very remote from that of the latter two species, the 

 climatic conditions being wholly dissimilar. I cannot identify 

 diver gens Hald., who states that the prothorax has two diverging 

 velvety lines, the oblique elytral fasciae somewhat as in alpha, but 

 with an abdomen darker than the sterna and "polished"; it is 4 

 mm. in length. 



Leiopus minuens Ham. (Tr. Am. Ent. Soc., 1896, p. 123), of which 

 I have four examples from the type locality, Lake Worth, Florida, 

 is not by any means a Leiopus but a Leptostylus, though the smallest 

 of the typical members of that genus, parvus being placed here above 

 in another genus; the basal joint of the hind tarsi is short and of the 

 Leptostylus type. Dr. Hamilton evidently mixed his material, for 

 he states that the thoracic tubercles are "sometimes spinose, some- 

 times not." I have assumed that in the typical minuens the 

 tubercles are very obtusely rounded, as they are in my four speci- 

 mens, as well as in Leptostylus biustus and other similar forms. 

 Leiopus schwarzi Ham. (1. c., p, 124), is possibly also a Leptostylus, 

 or more properly, perhaps, because of the more pointed thoracic 

 tubercles, allied to Astylidius parvus Lee. I can form no idea of 

 Leiopus floridan us Ham., published (1. c.) as a variety of alpha, but 

 in all probability incorrectly. 



