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



part, a broad median vitta or two streaks on the disc of the prothorax, 

 the elytra (the inner, apical, and outer margins excepted), and the 

 legs in great part, infuscate or black. 



($. Aedeagus : median lobe strongly curved, produced into a 

 thin spoon-shaped lamella at the tip ; left lateral lobe rather convex, 

 very long, slender, sinuate, slightly hooked at the tip ; right lateral 

 lobe a little more than half the length of the left, curved and feebly 

 hooked at the apex. Plate VII, fig. 29. 



Length (axel, head) 5^9^ mm. {^ $.) 



Hab. Mexico, Tuxtla (Salle), Teapa (H. H. Smith); 

 Guatemala, Lanquin [type], San Juan, and Panzos in 

 Alta Vera Paz (Champion) ; Nicaragua, Chontales (Belt), 



The pair labelled by Gorham as the types are immature 

 and almost immaculate, and the name exsanguis, therefore, 

 is misleading. A series from Teapa includes all the above- 

 mentioned forms. The present species is very closely 

 related to C. lituratus (= emaciatus), Gorh., from which 

 it mainly differs in its more promiinent eyes in both sexes, 

 and the narrower body. The aedeagus is very similarly 

 formed in the two species, and is different in structure 

 from that of the other forms (one of which is also from Alta 

 Vera Paz) included by Gorham under C exsanguis. The 

 single dark male from Panzos has stouter antennae, 

 and the left lateral lobe of the aedeagus shorter and more 

 sinuate, and it may therefore belong to yet another species ? 

 An immature pallid male from Chontales has the sides of 

 the prothorax deeply sinuate. Eight males have been 

 dissected, the figure of the aedeagus being taken from the 

 Lanquin type. 



26. Chauliognathus decolor, n. sp. 

 Chauliognathus exsanguis, and var., Gorh., Biol. Centr.-Am., 

 Coleopt. iii, 2, p. 279 (nee p. 74). 



Pale testaceous, the antennae (except the basal joint in some 

 examples) and a fine line along the base and outer margin of the 

 elytra (wanting in immature specimens) fuscous, the elytra often 

 becoming more or less infuscate to near the apex and with the tip 

 yellowish (the varietj^ described by Gorham), the eyes black; finely 

 pubescent, shining, the elj'tra duller towards tlie apex. Head 

 much narrowed behind, the eyes prominent; antennae very long 

 and slender, nearly reaching the tip of the elytra in ^, shorter in ?, 

 joint 3 nearly three times as long as 2. Prothorax narrow, longer 

 than broad, wider in $, more or less sulcate down the middle and 



