74 Mr. G. C. Champion's Revision of the Mexican 



Var. ? Head wholly black ; prothorax smoother and more 

 abruptly explanate; elytra distinctly costate. $. 



^. Eighth ventral segment cleft and bilobed at the tip ; ninth 

 segment polished, rather convex, narrowed towards the apex, the 

 internal sac (as seen evaginated) armed with several small and four 

 long spines — one projecting at right angles on each side, stout, 

 hooked at the tip, one on the ventral aspect directed vertically, cleft 

 at the apex, and another on the dorsal aspect, pointed at the tip. 



Hab. Mexico, Morelos and Durango. 



There are four specimens of this species in the " Biologia" 

 collection, one of which ($), from Las Peras in Oaxaca, 

 with the head wholly black, may belong to a different 

 species. The spines projecting from the evaginated 

 internal sac of the aedeagus are long and stout, and another 

 pair of stout spines are visible beneath the eighth ventral 

 segment after the ninth segment has been extracted, 

 corresponding to the long hooks present in Photinomorpha 

 simulans. Gorham describes the outer hind tarsal claw 

 of the male as " vix fissis," whereas it has a rounded 

 lobe similar to that on the corresponding claw of the 

 intermediate and anterior tarsi. 



3. Polemius integer, n. sp. 



Moderately elongate, rather broad, dull, finely pubescent; black, 

 the sides of the head in front, the base of the mandibles, and the 

 sides of the prothorax broadly (leaving a broad, black, posteriorly 

 dilated vitta or triangular patch), yellow. Antennae (cj) moderately 

 long, subserrate, tapering outwards, with joint 3 shorter than 4; 

 (?) much stouter and shorter, with joints 3 and 4 equal in length. 

 Eyes rather small in both sexes. Prothorax {^) strongly transverse, 

 svibtruncate in front, gradually narrowing from the base, the margins 

 broadly explanate, entire, plicate at about the basal fourth above ; 

 ($) wider and with the sides more rounded. Elytra moderately 

 long, about as wide at the base as the prothorax, more or less ex- 

 planate from a little below the shoulder, feebly costulate on the disc. 

 Inner claw of anterior tarsi, and outer claw of the other tarsi, broadly 

 lobed in ,^. 



3*. Eighth ventral segment long, acuminate, carinate down the 

 middle, feebly cleft at the tip ; ninth segment oblong, rounded at the 

 apex, a stout, feebly curved, flattened tube partly extruded (fig. 27, 

 dorsal aspect). 



Length (excl. head) S-IO^, breadth 3^-5 mm. {S ?•) 



