LACCOHIUS Krichson. 



LACCOUIUS ELONGATUS. 

 1*1. 7, J/itfs -'7, L'S. 



Laccobiu* tlongatus Scutld.. Bull. 1'. S. Geol. Geogr. Surv. Terr., IV, 701 (1*78). 



A single .specimen and its reverse exhibit the elytron of \\ slender 

 .-pecies nf Laccolmis. It is more tlian two ami a half times longer than 

 limail, ami is furnished with thirteen equidistant, delicately punctured, 

 faintly impressed Mria-. the punctures of which are more apparent on the 

 liasal than on tin- apical half; the inner stria is as distant from the sutm-ai 

 bonier as from the neighboring stria, while the outer is scarcelv separate 

 from tin- miter margin. The species is very large, ami also very slender, 

 for a Laccnbius, in 'which genus, however, I am inclined to place it, from 

 the large number of punctured stria-. The elytron has much the general 

 appearance of that of a Lebia, but the number of striae, of course, forbids 

 such a reference. 



Length of elytron, 2.9 mm ; breadth, 1.1""". 



(ireen River, Wyoming. One specimen, No. 81" and 13G 1 -' (Mr. F ( ' 

 A Uichardson). 



BEROSUS Leach. 

 BEROSUS SEXSTRIATUS. 



PI. 7. Kit;. " 



HerotiiK testtriatu* Semld., Bull. U. S. Geol. Geogr. Surv. TITP., IV, 7fiO-?61 (1*76). 



A -in^-le well preserved elytron represents a species scarcely smaller 

 than 1 1. pnnctipennis ( 'hevr. (undescr. 1 ) from Mexico, with the elytra of 

 which it aUn a'jri'.-s in the character of the tip and in the shape of the whole. 

 nnle-is in the fos-il it tapers more toward the base; the latter is also remark- 

 able tor the absence of the t\vo lateral stria-, the others retaining their nor- 

 mal poMiimi: and for the deli cacy of the Striae themselves, which areesi-n 



nmre t'a'mtlx impressed than in B. cuspidatus Chevr., and, unlike all Hei-.^i I 

 lia\e seen, are nearlv devoid of any sign of punctuation ; faint traces only 

 can be ^een \\heii ina^iiitied twenty-five diameters. As not unfrequently 



happen- in Hydrophilidffi, although I have not noticed it in BerosUR, a 



.11 nf tin- ; ' ->,iuili. 



\ o|.. Mil 



