154 Mr. G. C. Champion's Revision of the 



or rufo-testaceous ; the femora are broadly testaceous at 

 the base; the antennae are moderately long, tapering 

 outwards in both sexes; and the prothorax is oblong 

 subquadrate, with narrowly reflexed margins, the surface 

 opaque. The allied C. obscurus, SchaefEer, from Nogales, 

 Arizona, is stated to have a longer third antennal joint, 

 and the elytra, except basal part of margin and anterior 

 part of suture, black. 



23. Chauliognathus sulphureus. 



Chauliognathus sulphureus, Waterh., Trans. Ent. Soc. Lond. 



1878, p. 331 (?). 

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



iii, 2, pp. 73, 279 {nee Waterh.). 



cj. Aedeagus : median lobe strongly bowed, the apical portion 

 obliquely produced; left lateral lobe long, rather convex, feebly 

 sinuate within, hooked at the tip ; right lateral lobe much shorter 

 than the left, compressed, the apical portion somewhat spoon - 

 shaped. Plate VII, figs. 27, 27a. 



Hab. Mexico, Vera Cruz; Guatemala; Nicaragua; 

 Panama; Amazons. 



The type of this insect is an immature discoloured female, 

 from Nauta, in the Amazon valley; but there can be no 

 doubt as to the identification of the species. C. sulphureus 

 may be readily distinguished from C. pallidus, Waterh., by 

 its larger size, the uniformly sulphur-yellow or ochreous 

 upper and under surfaces, the black antennae and legs, 

 and the dark wings; the somewhat attenuate elytra do 

 not quite cover the abdomen or wings (this being especially 

 noticeable in the female), the eyes are relatively smaller 

 and less prominent in the male, and the lateral lobes of 

 the aedeagus are very differently shaped. 



24. Chauliognathus pallidus. 



Chauliognathus pallidus, Waterh., Trans. Ent. Soc. Lond. 



1878, p. 330 (cJ) (nee Gorh.). 

 Chauliognathus oedemeroid.es, Gorh., Biol. Centr.-Am., 



Coleopt. iii, 2, pp. 73, 279. 

 Chauliognathus fuscescens, Gorh., loc. cit. p. 73. 



Hab. Mexico, Vera Cruz ; British Honduras ; Guate- 

 mala; Nicaragua; Costa Rica; Panama; Colombia 

 {Mus. Brit.), etc. 



