Biacksurn AND SHARP—On some New Species and Genera of Coleoptera. 141 
B. striatus. In this, and especially in the two species following it, the supple- 
mentary segment of the male is very strongly developed, appearing in B. impressus 
like a narrow more or less elongate plate, with almost parallel sides. The female 
of striatus (so far as my material furnishes evidence) is usually only a little paler 
than the male in colour. Of B. impressus one of my female specimens has the 
hind body bright clear yellow, while in the other it is of a similar tint, but slightly 
clouded with fuscous. 
T. B.] 
Fam. COLYDIID/. 
EULAcuus. 
Eulachus hispidus, n. sp.—Parum elongatus, angustulus, parallelus subcon- 
vexus, rufobrunneus; setis albidis vestitus; prothorace vix transverso, obscure 
punctato, lateribus obscure crenulatis, disco profunde impresso, basi utrinque acute 
producto, elytris obscure seriatim punctatis, interstitiis opacis, haud distincte 
punctatis. Long. 3 m.m. 
This peculiar little insect has much the appearance of a Ditoma. The sides of 
the thorax are crenulated, the basal crenulation being produced into an acute 
tooth. The details of form and sculpture, however, are hidden by rows (six on 
the thorax and the same number on each of the elytra), of white erect sete, very 
similar to those of certain Proterhini. 
I have attributed this insect to Eulachus; but, as I have not the opportunity of 
actual comparison with that genus, my reference must be partly conjectural, 
though it cannot be far wide of the mark. 
It may be desirable to record the following characters of E. hispidus :—Kycs 
rather finely facetted, large, and very prominent; antennz inserted under the 
margin of the forehead, thick, and longer than the thorax; joints one to four 
longer than broad, five to nine transverse, ten and eleven forming a well-defined 
club, of which the former joint is transverse, the latter elongate ; front tibiz finely 
spinous and enlarged at the apex, where there is a bent spine; the other tibiz 
sparingly clothed with scales, but not spined, and only slightly enlarged towards 
the apex ; joints one to three of the tarsi gradually decreasing in length ; joint 
four about equal to the sum of the others; anterior coxe contiguous. There is a 
large, profound, and nearly circular impression (possibly sexual) near the apex of 
the metasternum, and the basal segment of the hind body is considerably longer 
than the others. 
A single specimen occurred near Honolulu under the bark of a tree, at an elevation of about 1000 
feet, probably connected with the excavations of a species of Bostrichide. 
es 
