466 COLYDIIDA. 
shining, only finely punctate ; the cost indistinct at the base, the second very strongly 
elevated before the apex. Ventral segments shining, rather finely punctured, without 
any rugosities. Male with long conspicuous hairs on the middle joints of the antenne. 
We have received a dozen examples of this fine and distinct species. 
2. Colydium mexicanum, 
Colydium mexicanum, Reitter, Deutsche ent. Zeitschr. 1878, p. 118°. 
Hab. Muxico!, Jalapa, Esperanza, Las Vigas, Amecameca (Hoge), Jacale (Sallé). 
This species closely resembles C. guatemalenum as well as C. filiforme, but is readily 
distinguished from both by the shining ventral segments, which have only a few 
transverse rugosities at the sides. 
8. Colydium guatemalenum, sp. n. 
Elongatum, subcylindricum, nigrum, subnitidum; antennis pedibusque rufis; capite prothoraceque fortiter 
punctatis, hoc tristriato, angulis anterioribus prominulis ; elytris costatis, costa secunda ante apicem quam 
costam primam paulo magis elevata, interstitiis fortiter biseriatim punctatis. 
Long. 53-73 millim. 
Hab. Guaremata, Zapote, Capetillo, Guatemala city (Champion). 
Head rather short; epistome pubescent in front; supra-ocular carina very obscure. 
Club of antennee moderately long. Thorax nearly straight at the sides, very slightly 
narrowed behind; the surface coarsely punctured, with a deep median stria extending 
from the base to the apex, and on each side a deep lateral stria, extending nearly to the 
base, and having its outer margin slightly elevated. Elytra with the apical declivity 
elongate, the coste well marked; on the middle of the length the first costa is more 
elevated than the second, but on the declivous part the second is slightly higher than 
the first. The ventral segments are coarsely strigose-punctate. The male has a very 
scanty pubescence on the middle of the antenne. Fifteen specimens. 
4. Colydium chiriquense, sp. n. 
C’. elongato persimile. Angustum, subcylindricum, piceum, nitidum; prothorace tristriato, nitido, parce 
punctato, angulis anterioribus acutis, perparum productis; elytris argute costatis, costis prima et secunda 
versus apicem eequaliter elevatis. 
Long. 53 millim. 
Hab. Panama, Volcan de Chiriqui 2500 feet (Champion). 
Head closely, moderately coarsely punctate; supra-ocular carina extremely fine; 
epistome with long pubescence (in the male). Thorax shining, sparingly punctured; 
median stria deep, entire, the lateral stria very nearly reaching the base. Elytra with 
the scutellar stria subobsolete ; the first costa evenly elevated from the base to the apex ; 
the sutural costa distinctly elevated at the apex, so that it and the first and second are 
