and Central A^nerican TelepJwrinae. 69 



mens), the sutural and outer margins of the elytra, the coxae, 

 trochanters, femora, and tibiae, and the abdomen in part, testaceous 

 or rufo-testaceous. Antennae long and slender. Eyes small. 

 Prothorax ((J) transverse, somewhat rounded at the sides, the 

 latter angularly notched at some distance behind the middle, the 

 hind angles obtuse; ($) broader, the sides rounded anteriorly and 

 bisinuate between the middle and the base. Elytra long, wider 

 than the prothorax, subparallel in ^, slightly dilated from a little 

 below the shoulder in $. Inner claw of anterior tarsi, and outer claw 

 of the other tarsi, lobed in cj, the lobe on the posterior pair denti- 

 form. Sixth ventral segment very deeply triangularly emarginate, 

 and the seventh raised on each side of the median fissure towards 

 the apex, in (^. 



Length (excl. head) 9-10, breadth 3-4 mm. (^ $.) 



Hab. Mexico, Juquila in Oaxaca (Salle). 



One male and two females (one of the latter with the 

 prothorax immaculate), left undetermined by Gorham. 

 The form of the (J tarsal claws (except that the shorter 

 portion of the outer posterior one is less acute) brings this 

 species near D. normale, from all the varieties of which 

 D. nigrifrons may be separated by the basally narrowed 

 prothorax of the male, and the peculiarly marked head. 

 The female is extremely like the same sex of certain varieties 

 of D. inconstans and D. rufipes, but it has the prothorax 

 differently shaped and the head otherwise coloured. The 

 aedeagus has not been dissected, but the form of the cleft 

 seventh ventral segment ((^) is very like that of D. normale. 



Photinomorpha, n, gen. 



Head short, vertical, completely invisible from above ; antennae 

 rather short, stout, serrate, joint 2 more than half the length of 3 ; 

 prothorax semicircular, explanate laterally and anteriorly, without 

 trace of marginal notch in either sex; elytra long, broadly dilated 

 from a little below the humeri; seventh ventral segment divided 

 down the middle in ^ ; tarsi each with one claw broadly lobed at 

 base in cJ, the penultimate joint a little longer than the third. 



Type, P. simulans, n. sp. 



The two species placed under the above generic name 

 bear an extraordinary resemblance to various Lampyrids 

 inhabiting the same region. They were at first included 

 by me under Polemius, P. {Discodon) serricornis and 

 liiguhris, Gorh., being to some extent intermediate; but 



