Mexican and Central American Chauliognathinae. 153 



<J. Aedeagus : median lobe obliquely curved, produced at the 

 apex; left lateral lobe stout, long, concave, compressed and sub- 

 angularly dilated at about the middle, hooked at the tip; right 

 lateral lobe much shorter than the left, compressed, somewhat 

 spoon-shaped at the apex. Plate VII, figs. 25, 25a. 



Length (excl. head) 9^12 mm. (<? ?.) 



Hab. North America, Texas, Arizona; Mexico (Miis. 

 Brit., ex coll. Fry), Villa Lerdo in Durango (Hoge). 



The fifteen specimens from Durango from which the 

 above description is taken vary in the development of 

 the markings on the prothorax and in the size of the dis- 

 coidal spot on each elytron; but they all have the base 

 of the femora to a greater or less extent testaceous, whereas 

 the N. American forms are said to have the legs black. 

 This character, however, is scarcely of specific value, and 

 in the absence of material from north of the Mexican 

 frontier for comparison the Durango insect is best treated 

 as a form of C. discus, of which C. misellus would appear 

 to be a variety. Leconte first gave " Mexican boundary " 

 as locality, later (and apparently from other specimens) 

 substituting " Texas." Horn's C. misellus was from 

 Arizona. 



22. Chauliognathus marginatus. 



Cantharis marginata, Fabr. Syst. Ent. p. 206. 



Chauliognathus marginatus, Hentz, Trans. Am. Phil. Soc, 

 n. ser., iii, p. 460; Lee, Proc. Acad. Phil, v, p. 388 

 (1851) ; Trans. Am. Ent. Soc. ix, p. 44; Crotch, Trans. 

 Am. Ent. Soc. v, p. 78. 



Cantharis ligata. Say, Journ. Acad. Phil, v, p. 166. 



Chauliognathus hentzii, Lee, loc. cit. 



cJ. AedeagiTS : median lobe obliquely bent ; left lateral lobe 

 extremely elongate, strongly sinuate, acuminate and hooked at the 

 tip ; right lateral lobe short, compressed, obliquely bent and hooked 

 at the apex. Plate VII, fig. 26. 



Hab. North America, New York to Florida; Mexico, 

 Monterey in Nuevo Leon {Hoge). 



This common N. -American insect is now known to extend 

 into Mexico. It has a broad V-shaped mark on the head, 

 a broad median vitta on the prothorax, and a discoidal vitta 

 on each elytron (sometimes reduced to an oblong subapical 

 spot), black, the rest of the upper surface being testaceous 



