and Central American Telephorinae. 83 



This insect varies in colour according to the amount of 

 development of the flavous or black portions of the surface, 

 some examples having the sterna, abdomen, antennae, 

 and legs almost entirely pale. Immature specimens, too, 

 are more shining than the others. The var. a was included 

 by Gorham under Discodon nor7nale. The other forms have 

 all been found at Chilpancingo or Omilteme. The pro- 

 thoracic notch is sometimes wanting in the males. P. 

 bivittatus is mainly recognisable by the bivittate pro- 

 thorax and the uncleft (^ tarsal claws. A long series from 

 Guerrero and Oaxaca has been examined. Two males 

 dissected. 



14. Polemius fuscovittatus, n. sp. 



Discodon marginatum, Gorh., Biol. Centr.-Am., Coleopt. iii 

 2, p. 286 {nee p. 80). 



Moderately elongate, shining, finely pubescent; testaceous, the 

 eyes, the basal half of the head, and the abdomen in part infuscate 

 or black in some examples, the prothorax rarely with a small trans- 

 verse dark mark on the disc, the elytra each with a broad fuscous 

 vitta of variable length on the disc, sometimes interrupted or con- 

 stricted below the base and always reaching to near the apex. Eyes 

 large and prominent in (^, smaller in $. Antennae long and slender. 

 Prothorax (^) narrow, broader than long, binodose on the disc 

 behind, the margins narrowly reflexed and notched at about one- 

 third from the base, the hind angles obtuse ; ($) broader, narrowing 

 from the basal third, the margins bisinuate. Elytra wider than the 

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

 of the other tarsi, angularly dilated at base. 



c^. Eighth ventral segment broad, the short dorsal portions of 

 the same segment hooked at the tip ; ninth segment oblong ; two 

 curved spines visible within the internal sac, and two long, stout 

 truncated hooks projecting from beneath them. (Figs. 34, 34o.) 



Length (excl. head) 7-7|-, breadth 2^-3 mm. (3 ?.) 



Hah. Mexico, Playa Vicente and Jalapa in Vera Cruz. 



Four males and two females. Less elongate and more 

 shining than the Guatemalan Discodon marginatum, Gorh., 

 the prothorax of the male not hollowed at the sides behind 

 the middle, and with a definite notch, the tar&al claws not 

 cleft in this sex, the genital armature different. 



