96 Mr. F. P. Pascoe on the Colydiide 
Ferruginous, darker posteriorly, subnitid ; head about as broad as the 
prothorax, finely punctured, convex in front, the clypeus not hiding the 
lip; prothorax elongate, the anterior half rounded at the sides, finely 
punctured, the base with a small, shallow, squarish impression; scu- 
tellum elongate; elytra with rather narrow carine, the interstices with 
punctiform impressions, having the appearance of short interrupted lines 
in the intervals; body beneath ferruginous, with small, rather sparse 
punctures ; antenne and legs ferruginous. Length 1# line. 
Sosylus exilis. 
S. angustior, rufo-castaneus, vix nitidus; prothorace antice latiore, leviter 
punctato; elytiis interstitiis trilineato-impressis. 
Hab, Ega. 
Narrower than the last, subcylindrical, reddish chestnut, coarsely 
shining ; head as broad as the prothorax, convex and rather short in 
front, finely and closely punctured ; prothorax elongate, broadest ante- 
riorly, finely punctured, with a nearly obsolete semilunar impression at 
the base; scutellum elongate-triangular; elytra with narrow carine, 
the interstices with three impressed lines; body beneath chestnut-red, 
with oblong, rather distant punctures; legs reddish chestnut ; tarsi of 
the intermediate pair twice as long as its corresponding tibiz ; antennee 
reddish chestnut; eyes black. Length 1} line. 
The smallest and, proportionally, much the narrowest of the genus. 
Sosylus crassus. 
S. fuscus, nitidus; prothorace breviter ovato, parce punctato ; elytris for- 
titer carinatis, interstitiis lineis tribus impressis, media interrupta. 
Hab, San Paulo. 
Shortly subcylindrical, dark chestnut-brown, shining; head sparingly 
punctured, convex in front, the edges slightly rising above the eyes and 
terminating in a broadly emarginate clypeus, beneath which the lip is 
inserted ; prothorax shortly ovate, sparingly punctured, especially in 
front, an irregular transverse cleft close to the base, the sides narrowly 
margined; scutellum oblong-ovate; elytra strongly keeled, the inter- 
stices with three well-defined impressed lines, the middle one inter- 
rupted at short intervals ; body beneath chestnut-brown, shining, finely 
and sparingly punctured, the punctures on the last four abdominal seg- 
ments coarser and closer; legs and antenne pitchy brown; palpi ferru- 
ginous. Length 4 lines. 
The largest species of the genus, and differing in its shorter and 
broader prothorax from the other members of it. The head is con- 
cave in front like Metopiestes* ; and taking all the species of both 
genera into consideration, | am unable to detect any characters by 
* T have now three species of this genus, two of which are undescribed. 
