DIABKOTICA. 537 



d . The fifth, sixth, and seventh joints of the antennse widened and produced into a hooked point, the eighth 

 joint thickened ; elytra excavate near the apices. 



Length 2 lines. 



Head black, the frontal tubercles and the entire lower portion flavous ; clypeua flattened, with a short rather 

 indistinct central ridge ; antenna two thirds the length of the body, the three lower joints and the eighth 

 joint also flavous, the other joints piceous, the third joint twice as long as the second ; thorax transverse, 

 flavous, the surface impunctate, with a rather deep transverse, medially interrupted, depression ; scutellum 

 piceous ; elytra black, each with about six more or less distinct longitudinal costs, the interspaces trans- 

 versely reticulate and impressed with double rows of punctures, a triangular space at the apices flavous in 

 colour, excavate, and produced outwardly into a tubercle, the inner angle of this excavation being black, 

 the lateral margin flavous ; underside and legs flavous. 



Eab. Guatemala, San Geronimo (Champion). 



Only a single male specimen was obtained ; the female doubtless has, like several 

 other allied forms, simple antennse and elytra. D. difformis agrees almost entirely in 

 coloration and sculpture with D. longitarsis, but differs in the flavous face, the struc- 

 ture and colour of the antenna?, and the colour of the elytra. D. curtisi, Baly, and 

 D. coryphcea, Baly, have simple antennse in both sexes. 



78. Diabrotica flavo-vittata. 



Diabrotica flavo-vittata, Baly, Trans. Ent. Soc. Lond. 1886, p. 446 \ 

 Bab. Mexico, Yucatan \ 



79. Diabrotica cornuta. (Tab. XXXI. fig. 8.) 



Diabrotica cornuta, Baly, Trans. Ent. Soc. Lond. 1886, p. 448 \ 



Eab. Mexico \ Vera Cruz {coll Baly), Cordova, Tuxtla (Salle), Acapulco (Edge) ; 

 Guatemala x . — Peru 1 . 



In one specimen before me the labrum is black; and in another the sixth and seventh 

 joints of the antenna? only are black. D. cornuta may be recognized by the black 

 thorax, and the male by the curious protuberances of the clypeus. 



A specimen from Cordova is figured. 



80. Diabrotica setosa. (Tab. XXXII. fig. 19.) 



Diabrotica setosa, Baly, Trans. Ent. Soc. Lond. 1886, p. 454 \ 



Eab. Mexico, Teapa 1 ; Guatemala, Cerro Zunil (Champion). 



A single specimen only was obtained by Mr. Champion in Guatemala; this agrees 

 entirely with the author's description, though the hairs are only just visible on the 

 elytra. In the Guatemalan specimen the antennse are black, with the three basal 

 joints testaceous below, and the sixth and seventh joints flavous. 



The Mexican locality, Teapa, requires confirmation. 



biol. centk.-amee., Coleopt., Vol. VI. Pt. 1, August 1887. 3 Z 



