Mexican and Central American Chauliognathinae. 157 



with the margins moderately reHexed. Elytra long, incompletely 

 covering the abdomen in $, somewhat attenuate posteriorly. 



(^. Aedeagus : median lobe stout, curved, obliquely cut off at tip ; 

 left lateral lobe long, slender, abruptly and arcuately twisted from 

 about the middle, and blunt at the apex ; right lateral lobe broader 

 than the left, compressed, moderately long, armed with a rather 

 long, curved, ciliate, tooth-like prominence at the base, and feebly 

 bidentate at tip. Plate VII, fig. 30. 



Length (excl. head) 6^10 mm. ((^ $.) 



Hob. Panama, Bugaba, Tole, Los Remedies (Champion). 



Seven females and two males, the latter immature. 

 This is the insect referred by Gorham in his " Supplement " 

 to C. exsanguis, under which he originally included two 

 Guatemalan forms. The present species is closely related to 

 C. suhmarginatus (the male having a very similarly formed 

 aedeagus), from which it may be distinguished by the 

 longer second antennal joint, the immaculate shining pro- 

 thorax, etc. The antennae are longer than in C. exsanguis. 



27. Chauliognathus evanidus, n. sp. 



Chauliognathus exsanguis, Gorh., Biol. Centr.-Am., Coleopt. 

 iii, 2, p. 74 (part.) {nee p. 279). 



Opaque, testaceous, the antennae, and in one specimen the knees 

 and tarsi also, infuscate. Head much narrowed behind, the eyes 

 large and prominent ; antennae very long and slender, joint 3 about 

 three times the length of 2. Prothorax rounded-subquadrate, nar- 

 rower in ^ than in $. Elytra elongate, nearly covering the abdomen. 



(J. Aedeagus : median lobe very stout, not produced at the apex ; 

 left lateral lobe moderately long, compressed, blunt at the tip, with 

 a strongly curved, long, stout hook abruptly projecting from the 

 inner edge at some distance before the apex; right lateral lobe* 

 about as long as the left, broad at the base, the longer apical portion 

 becoming abruptly narrower and compressed, feebly bidentate at 

 the tip. Plate VII, fig. 31. 



Length (excl. head) 8-10| mm. (c? ?.) 



Hab. Guatemala, Panima [(^], Panzos [$] (Champion). 



One pair. This insect is very hke C. decolor, but has 

 longer elytra, a broader head and prothorax (especially 

 noticeable in (^), and a differently formed aedeagus, the 

 left lateral lobe bearing a twisted, projecting, hook-Uke 



* Accidentally broken off after the description was written. 



