Mexican and Central American Chauliognathinae. 137 



as to the Lampyriform females being the sexual complement 

 of C. corvinus, notwithstanding their different general 

 facies. Gorham, moreover, had placed a similarly coloured 

 pair from Chontales under his C. haereticus ; and amongst 

 the males referred by him to the former there was one 

 Daiphron proteum (from San Isidro), showing the close 

 resemblance between one of the forms of that variable 

 insect and typical C. corvinus, (^. The antennae in the 

 females are nearly as broad as in his D. proteum. A male 

 from each country has been dissected ; they have the very 

 long left lateral lobe of the aedeagus more slender, and 

 the median lobe less produced at the apex, than in the 

 Daiphron. Discodon chiriquense, Pic, may be a female 

 of this insect. 



[3. Chaidiognathus morio. (Plate III, fig. 7, ^.) 



Chauliognathus morio, Gorh., Biol. Centr.-Am., Coleopt. iii, 

 2, p. 77 (?) (1881) (nee Daiphron morio, Kirsch, 1888). 



(J. Aedeagus : median lobe very stont, curved, produced at the 

 apex into a broad spoon-shaped process ; left lateral lobe rather 

 short, broad, compressed, convex at the base externally, concave 

 within, subangularly dilated at a little beyond the middle, and 

 feebly hooked at the apex; right lateral lobe longer than the left, 

 tortuous, abruptly curved from about the basal third, and obliquely 

 acuminate at the tip. Plate IV, figs. 7, la. 



Hah. Brazil, Santa Catharina. 



This species, the female only of which was known to 

 Gorham, must be erased from the Central American Ust; 

 it is an inhabitant of Brazil, as proved by the presence of 

 a pair from Santa Catharina, and other allied forms from 

 Brazil, in the Fry collection. The type (?), from the 

 Sturm collection, is labelled " ? Mexico." C. morio bears 

 an extraordinary resemblance to a large elongate Photinus, 

 of the family Lampyridae, as stated by Gorham. The 

 antennae in both sexes are rather short, and have the 

 intermediate joints broadly widened and subserrate, 

 tapering rapidly towards the tip. The three specimens 

 before me (one male and two females) are similar in shape, 

 nigro-fuscous in colour, with the margins of the prothorax 

 and the sutural and outer edges of the elytra fiavescent. 

 The prothorax is transverse, narrowed anteriorly, deeply 

 impressed down the middle behind, and with the margins 

 broadly reflexed. A male from Brazil is figured.] 



