Mexican and Central American Chauliognathinae. 135 



6. Elytra gradually narrowed posteriorly, 

 lanciform or subulate, usually not quite 

 covering the abdomen ; antennae filiform 

 or subfiliform, often longer in (J ... Species 19-33. 



c. Elytra somewhat abruptly subulate, usually 



covering the abdomen; antennae filiform 



or subfiliform Species 34-38. 



d. Elytra subulate, short, not nearly covering 



the abdomen in either sex; antennae 



filiform or subfiliform Species 39, 40. 



1. Chauliognathus proteus. (Plate III, figs. 3, ^, 4, $.) 



Daiphron proteum, Gorh., Biol. Centr.-Am., Coleopt. iii, 

 2, pp. 68, 277, pi. 5, figs. 14, 15, 16 ; Pic, Melanges 

 exot.-entomologiques, fasc. vi, p. 9 (July, 1913). 



^. Aedeagus : median lobe obliquely bent ; left lateral lobe very 

 elongate, sinuate, acuminate and slightly hooked at the tip; right 

 lateral lobe short, compressed, obliquely bent at about the middle, 

 and produced into a rather long curved liook at the apex. Plate 

 IV, figs. 5, 5a. 



Hah. Mexico, from Durango southward; British Hon- 

 duras; Guatemala; Costa Rica; Venezuela {ex coll. 

 Fry). 



An abundant insect in Central America, but not yet 

 received from Nicaragua or Panama, and extremely vari- 

 able in the colour and markings of the elytra, the pro- 

 thorax, too, wanting the median vitta in some examples, 

 similar variations in colour amongst certain ChauUognathi 

 having been given specific rank by Gorham and others. 

 The male has the subparallel general shape of a Telephorid 

 and the female the facies of a Lycid, this being especially 

 noticeable in the form of Daiphron proteum selected by 

 Gorham as the type, i. e. the one with uniformly brick-red 

 elytra, of which, to judge from the series before me, the 

 male is rare and the female common. The male of the 

 var. nigripennis, Pic, is extremely like the same sex of 

 Chauliognathus corvinus, Gorh., and the two were found 

 mixed in the " Biologia " collection. The following 

 varieties, all noticed by Gorham, who selected the ochreous 

 form as the type, have recently been named by Pic : — 



1. Elytra black, with testaceous oblong humeral 

 patch of variable extent (fig. 16 of 

 Gorham) apicalis. 



