DISONYCHA. 311 



tate ; scutellum black; elytra widened towards the middle, rather strongly convex and closely punctured, 

 testaceous, the lateral and sutural margin narrowly black ; a spot of the same colour is placed at the 

 middle of the base and another larger one at the extreme apex ; of the two bands, the first extends across 

 the disk before the middle, and is widened at the suture, the other (of broader shape, and with its anterior 

 margin angulate near the suture) is placed directly below the middle ; posterior femora strongly incrassate ; 

 posterior first tarsal joint nearly as long as the three following joints united. 



Hab. Mexico, Cordova (SalU). 



Of a more convex and robust shape than is generally the case in this genus, and 

 rather easily distinguished by its coloration. Three specimens are before me. 



17. Disonycha glabrata. 



Crioceris glabrata, Fabr. Spec. Ins. i. 1781, p. 156 \ 



Galleruca glabrata, Fabr. Ent. Syst. i. 2, p. 25 (1792) 2 ; Syst. El. i. p. 494 (1801) 3 . 



Altica glabrata, Oliv. Ent. vi. p. 685, t. ii. fig. 28 *. 



Disonycha glabrata, Har. Coleopt. Hef te, xv. p. 4 5 . 



Altica alternata, Latr. Voy. Humb. ii. 1883, p. 39, t. 23. fig. 12 6 . 



Crioceris tomentosa, Fabr. Syst. Ent. p. 122 7 . 



Hab. Noeth America x 2 3 4 . — Mexico, Jalapa, Oaxaca, Cordova (Edge), Vera Cruz, 

 Cuernavaca, Cordova, Yolos, Tuxtla, Istopan, San Andres (coll. Salle), Ventanas (Forrer); 

 British Honduras, river Hondo (Blancaneaux) ; Guatemala, Zapote, San Ger6nimo, Las 

 Mercedes, Teleman (Champion); Nicaragua, Chontales (Janson); Costa Eica (Van 

 Patten), Cache (Bogers) ; Panama, Volcan de Chiriqui, Bugaba, Taboga Island 

 (Champion). — Colombia 56 (coll. Jacoby); Peru (coll. Jacoby) ; Jamaica 7 . 



This abundant and widely distributed species is one of those forms which, on account 

 of the similarity of its pattern, which it has in common with many allied species, is 

 not always easy to separate. Its principal distinguishing character is to be found in 

 the broad central dark band, which is quite as broad as or broader than the yellow 

 portion, and in the impunctate elytra. Von Harold, in describing an allied species 

 (B. prolixa), says that in B. glabrata the third and fourth joints of the antennse are equal 

 in length ; but in all the very numerous specimens from the localities quoted above, and 

 which I must of necessity refer toD. glabrata on account of their similarity to specimens 

 from Peru, Bogota, &c, contained in my collection, I find that the third joint is 

 distinctly shorter than the fourth. I may further remark that the legs in all my 

 specimens are fulvous, and the elytral epipleurse black. 



18. Disonycha alternata. 



Haltica alternata, Illiger, Mag. fur Ins. vi. 1807, p. 144 \ 



Var. fumata, Lee. Proc. Ac. Phil. ix. 1858, p. 86 \ 



Disonycha plurigata, Lee. Journ. Ac. Phil. iv. 1858, p. 27 ; Coleopt. of Kansas, 1859, p. 25 \ 



Disonycha pura, Lee. Proc. Ac. Phil. ix. 1858, p. 86 4 . 



Disonycha o-vittata, Say, Journ. Ac. Phil. iv. 1, 1824, p. 85 5 . 



