DIASTETHUS. 229 
Hab. Mexico (Mus. Brit.). 
One male, labelled Centrinus subarmatus, S., in the British Museum, but differing 
from that species in the longer and more slender rostrum, the basally depressed, more 
feebly striate elytra, the bidentate femora, and the sharply dilated apices of the tibie. 
It is nearly related to D. aztecus, but has a less convex prothorax, apically dilated 
tibie, &c. The tibiee are narrower and less bowed at the base than in D. falcatus and 
armed with a much sharper prominence near the apex. 
10. Diastethus pilipes, sp. n. (Tab. XIII. figg. 8, 8a, 3.) 
Oblong-subrhomboidal, shining, black, the antenne ferruginous, with the club darker ; glabrous above, the 
pro- and metasternum and the anterior and intermediate coxe clothed with hair-like, yellowish-white, 
striated scales, the punctures on the rest of the under surface each bearing a minute scale, the femora 
beneath and the inner edge of the tibiw sparsely pilose or ciliate. Head sparsely punctate; rostrum 
strongly arcuate, moderately long, thickly punctate, the antenne inserted at a little behind the middle, 
joint 2 of the funiculus much shorter than 1, the club ovate. Prothorax convex, rounded at the sides, 
sparsely, minutely punctate. Scutellum transverse. Elytra triangular, rather long, the humeri not very 
prominent; sharply striate throughout, the strie feebly punctate, the interstices smooth and flat. _ 
Prosternal sulcus narrow, deep. Anterior femora uni-, the others bidentate. 
¢g. Prosternum unarmed; metasternum and first ventral segment broadly depressed down the middle; 
anterior tibise closely ciliate within from the base to the apex. 
Length 51-64, breadth 2,9,-33 millim. (¢.-) 
Hab. Mexico, Toxpam in Vera Cruz (Sallé) ; Costa Rica, Alajuela (Orosco). 
Three males. More elongate than D. ater, the prosternum squamose and with a 
narrower sulcus, the anterior femora with one distinct tooth only, the tibie more or 
less ciliate within, the metasternum, as well as the first ventral segment, depressed in 
the middle in the male. The Mexican specimens are labelled with the MS. name 
Centrinus albopunctatus, Chevr., in the Sallé collection. 
11. Diastethus brevis, sp.n. (Tab. XIII. figg. 9, 9a, 3.) 
Subrhomboidal, short, convex, shining, black, the antennz and the tips of the tarsi ferruginous ; glabrous 
above, the punctures of the under surface each beariug a minute hair-like scale, the lower surface of the 
femora and inner edge of the tibie sparsely pilose. Head finely punctate ; rostrum stout, strongly 
arcuate, comparatively short, sparsely punctate, the antenne inserted far behind the middle, the club 
ovate and rather small. Prothorax convex, rounded at the sides, very sparsely, finely punctate. 
Seutellum strongly transverse, short. Elytra triangular, the humeri moderately prominent, the suture 
slightly depressed ; deeply striate throughout, the striz feebly punctate, the interstices flat and almost 
smooth. Prosternal sulcus very shallow and ill-defined. Femora shallowly sulcate beneath, each armed 
with two short sharp teeth. . 
3. Prosternum unarmed ; first ventral segment with a deep transverse excavation. 
Length 3%, breadth 23 millim. (d.) 
Hab. Mexico, Toxpam in Vera Cruz (Sallé). 
One specimen. A species of comparatively short form, with a shallow, indeter- 
minate prosternal sulcus, a small antennal club, a rather short, stout rostrum, a 
