494 COLYDIIDA. 
Subfam. LAPETHINA. 
: This subfamily as at present constituted is somewhat doubtfully distinct from the 
Cerylinz, and consists only of a few small insects from the New World. All are more 
convex insects than is usual in the Colydiide. | 
The Lapethine are distinguished from the Mychocerine by the prosternum having 
the chin-piece separated from the flanks by a deep fissure and by the aciculate palpi. 
Besides this, there is a want of agreement in many details. Although the Cerylon 
alliance is quite clear in Lapethine, I find little to indicate its existence in Mychocerus 
pilifer, Lewis. 
LAPETHUS. 
Lapethus, Casey, Ann. N. York Acad. v. p. 317 (1890). 
I think I am correct in referring to this genus a small insect found by Mr. Champion 
in Central America; but I have some doubt about it, as Casey says “ pronotum [no doubt 
in error for prosternum] widely separating the small globular coxe ”: in the Guatemalan 
insect the front coxee are moderately distant, the prosternum projecting beyond them in 
the form of a rounded prosternal process. 
In establishing the genus Lapethus, Casey referred it to the Murmidiine, where it 
was by him associated with Murmidius and Mychocerus. If we are in this country 
right as to the insects we assign to Lapethus and Mychocerus the two are by no means 
closely allied, neither is there any very near relationship between Mychocerus and 
Murmidius. As our Lapethus and Mychocerus do not at any rate enter the same 
subfamily, and as Mychocerus has already been dealt with in this work as an aberrant 
member of the Histeride (anted p. 244), it is unnecessary for me here to discuss the 
question further. 
1. Lapethus discretus. (Tab. XV. fig. 22.) 
Lapethus discretus, Casey, Ann. N. York Acad. v. p. 318°. 
Hab. Norn America, California !.—Gvatema.a, San Gerd onimo, E] Jicaro (Champion); 
Panama, Volean de Chiriqui (Champion). 
We have received six examples only of this species. The pair found by Casey in 
California were obtained from under old bark, near Humboldt Bay. Our individuals 
agree with Casey’s description, though he remarks that the thorax has the sides 
margined with a “thick acute bead.” In our example the sides of the thorax are 
finely margined. 
LYTOPEPLUS, gen. nov. 
Corpus ovatum, nudum ; prothorace ad elytra et ad mesosternum arcte applicato. Antenne octo-articulate 
clava ovata, uniarticulata. Coxe: omnes late distantes; prothorace anterius utrinque fovea elongata. 
Tarsi subtus ad basin longe setosi. 
This genus is closely allied to the preceding (Lapethus), but is distinguishable by the 
