444 HETEROMERA. 
* Prosternum subhorizontal, the apex slightly produced ; antenne with joints 3 
and 4 broadly dilated in the male. 
1. Meneceus crassicornis. (Tab. XX. figg. 14, 144, ¢.) 
Oblong ovate, moderately convex, reddish- or piceous-brown, dull, thickly pubescent. Head rather sparsely 
and somewhat coarsely punctured, the anterior half a little smoother; antenne rather long and stout, 
reaching beyond the first third of the elytra in the male, ferruginous, joints 3 and 4 greatly dilated in the 
male, 3 a little longer than 4 in the female; prothorax moderately convex, densely and somewhat coarsely 
punctured, the disc almost unimpressed, the basal fovee feebly indicated or obsolete; scutellum very 
closely punctured ; élytra finely punctate-striate, the punctures oblong in shape and approximate, the 
interstices almost flat and rather thickly and not very finely punctured ; beneath more shining, the pro- 
thorax in front, the mesothorax, the epipleur, and the metasternal side-pieces very closely and somewhat 
coarsely punctured; the mesosternum with coarse scattered impressions in front, smooth behind, the 
central part finely and rather closely punctured; the ventral surface with fine and very widely scattered 
punctures, the fifth segment unimpressed in the male; legs ferruginous. 
dé. Antenne with joint 3 very broadly and triangularly dilated ; 4 distorted, as long as and rather broader 
than 8, thickened beneath, and widening outwardly ; 5 rather narrower than 4, broader than long ; 6 about 
as long as broad and narrower than 5; 7-11 decreasing in width, but increasing in length. 
Length 6-73 millim.; breadth 23-31 millim. (¢ @.) 
Hab. Mexico, Matamoros Izucar and Atlixco in Puebla, Cuernavaca and Yautepec in 
Morelos, Jalapa, Acapulco (Hége); GuateMALa, Capetillo, Duefias (Champion). 
Numerous examples, five of which are males. The male of this insect is one of the 
most remarkable of the Central-American forms of Cistelide. 
** Prosternum convex, declivous behind ; antenne simple in the male. 
2. Menceceus eequalis. (Tab. XX. figg. 15,15 ¢, ¢; 15 a, labium ; 15 0, maxilla 
and maxillary palpus.) 
Oblong ovate, moderately convex, dull brownish-black, thickly pubescent. Head sparsely and finely punctured ; 
eyes (d) very narrowly separated ; antenne rather short, not reaching to the first fourth of the elytra in 
the male, joints 3 and 4 equal in length, fusco-ferruginous ; prothorax convex, finely, shallowly, and 
somewhat densely punctured, the disc very shallowly longitudinally impressed in the middle behind, the 
basal foveee scarcely indicated ; scutellum closely punctured ; elytra finely punctate-striate, the interstices 
flat and finely and rather closely punctured; beneath punctured as in WM. crassicornis; legs stout, fusco- 
ferruginous. 
Length 84-93 millim.; breadth 35-43 millim. (¢.) 
Hab. Mexico, Cordova (Hoge). 
Two examples, apparently both males. Larger and longer than I. crassicornis; the 
eyes more narrowly separated and the antenne simple in the male; the thorax more 
convex and more finely and much less densely punctured; the prosternum differently 
shaped, &c. 
The Texan species belongs to this section, and I give below a short description 
of it *. 
* Meneeceus texanus. 
Ovate, rather broad, piceous-brown, dull, thickly pubescent. Head sparsely and rather coarsely punctured ; 
