EXOPHTHALMUS. 261 
The above description is taken from a pair received from the late P. Biolley as from 
San José, agreeing with others I have seen from the Antilles. Can the insect have 
been introduced into Costa Rica % 
18. Exophthalmus impositus. (Tab. XI. figg. 26, 26a, ¢.) 
Eustales impositus, Pascoe, Ann. & Mag. Nat. Hist. (5) v. p. 427 (1880) °. 
Oblong, shining, black; densely clothed (except along the middle of the head and rostrum, on two vitte on 
the dise of the prothorax, on numerous irregular, confluent streaks or patches on the elytra, and along 
a broad space down the middle of the metasternum and the ventral segments 1-4) with white or pale 
brown scales—usually pale brown, with a broad stripe along the sides of the elytra and the legs white,— 
and also set with minute widely scattered adpressed hairs. Rostrum about as long as broad, depressed 
on each side of the smooth, stout, arcuate, median carina, which is widened behind and encloses the 
inter-ocular fovea; eyes large, rounded, not very prominent; antenne long, the scape reaching the 
anterior margin of the prothorax. Prothorax strongly transverse, narrowed in front, bisinuate at 
the base, depressed or flattened down the middle, with scattered, irregular, foveiform punctures. Elytra 
subparallel in their basal third in ¢, broader and widened to the middle in 9, mucronate at the tip, the 
humeri prominent ; coarsely punctate-striate, the punctures appearing small where covered by the dense, 
confluent, large patches of scales, the interstices flattened, the bare portions smooth. Anterior tibie 
obsoletely denticulate and with a long terminal claw. 
Length 10-14, breadth 33-53 millim. 
Hab. Nicaragua, Chontales! (Belt, Janson, Richardson) ; Costa Rica, Reventazon 
(Biolley), Turrialba, Zarzero (U.S. Nat. Mus.). 
I have seen about a dozen examples of this species, mostly females, varying very 
little in the arrangement of the scales on the elytra. The prothorax is constantly 
trivittate and the under surface bare down the middle. . impositus cannot possibly 
be included in Eustales, the type of which 1s Curculio thunbergi, Dalm. 
19. Exophthalmus triangulifer, sp.n. (Tab. XI. fig. 27, ¢ .) 
Very like E. impositus; the scales more uniformly distributed above and beneath, brown or greyish-brown 
(sometimes with a cupreous tint), intermixed with white, the white scales on the prothorax condensed into 
a narrow sinuous stripe on each side and another on its flanks, and those on the elytra into an angulate 
series of spots down the middle of the disc; the prothorax unimpressed along the median line; the 
elytra with fewer bare spaces, one only (triangular or <-shaped) near the suture before the middle being 
conspicuous, the scales clustered into smaller patches and giving a nodose or uneven appearance to the 
flattened surface. 
Length 8-12, breadth 21-41 millim. (3 2.) 
Hab. Costa Rica, Limoncito, Catias Gordas (Pittier), Cachi (Rogers), Turrialba, 
Tucurrique (U.S. Nat. Mus.); Panama (Mus. Brit.), Bugaba, Volcan de Chiriqui 
(Champion), Chiriqui (coll. Fry). 
A common insect in Chiriqui. It is very closely related to E. impositus, both forms 
occurring at Turrialba; but the uniformly squamose under surface, the non-sulcate 
prothorax, and the different arrangement of the scales on the elytra readily distinguish 
E. triangulifer. 
