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



in (J. Antennae slender. Protliorax ((^) a little broader than long, 

 binodose on the disc behind, abruptly, angularly constricted just 

 beyond the middle and with the sides subparallel thence to the 

 prominent hind angles ; (?) more transverse, and with the sides bi- 

 or trisinuate. Elytra long, a little wider than the prothorax, 

 subparallel. Inner claw of anterior tarsi, and outer claw of the 

 other tarsi, cleft in ^. 



cJ. Ninth ventral segment somewhat oval, a single spiniform 

 process projecting from the middle of the internal sac. 



Length (excl. head) 5-6|, breadth 1^-2 mm. {^ $). 



Hah. Mexico, Chilpancingo and Omilteme in Guerrero, 

 4600-8000 ft. {H. H. Smith). 



Thirteen specimens, females predominating, varying in 

 colour, according to the development of the oblique flavous 

 stripe on each elytron. Very like the Guatemalan D. tenue, 

 but with the sides of the prothorax broadly testaceous, and 

 the lateral notch of the ^ placed further forward and so 

 abrupt as to form a dentiform prominence in front ; the 

 inner anterior tarsal claw {^) also wants the sharp triangular 

 tooth at the base. The single specimen ($) with the femora 

 and elytra black superficially resembles D. carhonarium. 



16. Discodon anale. (Plate VIII, fig. 53, prothorax, ,^.) 



Silis analis, Gorh., Biol. Centr,-Am., Coleopt. iii, 2, p. 304. 



Elongate, narrow, somewhat shining, finely cinereo -pubescent ; 

 nigro-piceous or black, the anterior margin of the head, the base 

 of the mandibles, and the last abdominal segment in ^, flavous. 

 Head short, the eyes small; antennae long, sparsely pilose, and 

 with a stout basal joint, in <^, slightly shorter in $. Prothorax {^) 

 transverse, bicallose on the disc posteriorly, deeply, angularly excised 

 on each side behind the middle, the margins obliquely diverging 

 thence to the rather prominent hind angles, thickened and reflexed 

 in front of the emargination, and gradually converging thence to 

 the apex; (§) somewhat rounded and feebly sinuate at the sides, 

 and constricted before the sharp outwardly-directed hind angles, 

 the margins reflexed throughout, sometimes subangulate at about 

 the apical third. Elytra long, subparallel. Inner claw of anterior 

 tarsi, and outer claw of the other tarsi, perceptibly cleft at tip, in (J. 



(J. Last dorsal segment (= pygidium of Gorham) stout, long, 

 tubulate, bent downward at the apex; seventh ventral segment 

 long, broadly cleft down the middle, the lateral portions forming 



