210 PHYTOPHAGA. 



2. Zygogramma quenseli. (Tab. x. fig. 24.) 



Calligrapha quenseli, Stal, Diagn. 1860, p. 462 x ; Monogr. Chrys. Amer. p. 280 a . 

 ifo&. Mexico *■ 2 , Cordova, Santecomapan (Salle). 



On account of the claws in the present insect being united at their base, I have placed 

 it in Zygogramma. The ground-colour of the elytra is dark testaceous ; the oblique 

 shoulder-spot has a short stripe attached to it near the suture ; of the eleven or twelve 

 spots which occupy the rest of the disk, one is placed in the centre of the lateral 

 margin, preceded by another at the side of the shoulder-stripe ; three or four larger 

 spots in a semicircular position are placed below the middle, and four smaller ones in 

 a square at the apex. A variety from Santecomapan has the entire head rufous, and 

 the spots or stripes near the shoulder all confluent and attached to the suture, which is 

 also the case with the spot below the middle. On the whole, there is some slight difference 

 in the position of the spots in this specimen ; but I believe that I am right in considering 

 it a variety only. 



3 - Zygogramma piceicollis. (Tab. XI. figg. 23, 24, 25.) 



Calligrapha piceicollis, Stal, Diagn. 1859, p. 322; Monogr. Chrys. Amer. p. 253 \ 

 Calligrapha aggregata, Stal, Diagn. 1860, p. 461; Monogr. Chrys. Amer. p. 252 2 . 



Hah. Mexico \ Oaxaca, Las Vigas (Hoge), Guanajuato (Duges, coll. Salle), Coscoma- 

 tepec, Orizaba, Cuernavaca, Capulalpam, Yolos (Salle), San Luis Potosi (Br. Palmer); 

 Guatemala, Vol can de Agua, Capetillo, Duenas, San Geronimo (Champion) ; Costa Rica 

 (van Patten). 



The numerous specimens which are before me, as well as the insect named by Stal 

 C. aggregata, in Mr. Baly's collection, prove to me that the species is a very variable 

 one, not only in regard to the elytral designs, but to its general shape ; and I cannot 

 admit Stal's C. aggregata as more than a variety of the present species in which the 

 spots are broader and more confluent. Between this form and the true Z. piceicollis 

 I have many intermediate specimens, which may represent other species. Normally 

 marked specimens of Z. piceicollis (principally from Mexico) are of rather narrow and 

 elongate shape, the elytral spots being thin, and the one below the middle near the 

 suture representing a strong curve or hook ; other specimens are much shorter and 

 more convex, the spots thicker, and the curved one broken up into two, while in Stal's 

 C. aggregata they attain their maximum size and are partly confluent. Of each of these 

 forms a specimen is figured. The general colour of the insect varies from dark fulvous 

 to greenish seneous, the elytra being testaceous or obscure fulvous. 



4. Zygogramma Signatipennis. (Calligrapha signatipennis, Tab. XIV. fig. 24.) 

 Calligrapha signatipennis, Stal, Diagn. 1859, p. 321 ; Monogr. Chrys. Amer. p. 252. 

 Calligrapha hieroglyphica, Klug, Dej. Cat. 3rd ed. p. 422. 



