232 PHYTOPHAGA. 



slightly longer than the others, and often joined at the apex to the second stripe. As 

 in the preceding species, the body and thorax are either metallic green or blue. 



13. Leptinotarsa obliterate (Tab. xill. fig. 15.) 



Doryphora obliterata, Chevr. Col. de Mex. 1833, fasc. I 1 . 

 Leptinotarsa subnotata, Stal, Diagn. 1858, p. 476 2 . 

 Chrysomela obliterata, Stal, Monogr. Chrys. Amer. p. 162 3 . 



Hal. Mexico 1 2 3 , Toxpam, Cordova (Salle), Almolonga (Edge). 



This species so completely resembles L. nitidicollis, except in the elytral design, in 

 which the stripes are reduced to spots, that I have great doubt as to its specific 

 distinctness ; there are, however, no specimens before me with intermediate markings 

 to make me sure on this point. 



14. Leptinotarsa pudica. (Tab. XIII. fig. 25.) 



Leptinotarsa pudica, Stal, Diagn. 1860, p. 456; Monogr. Chrys. Amer. p. 162 \ 



Hab. Mexico \ Cordova (Edge), Juquila (SalU). 



Smaller than L. obliterata, and similarly marked, but at once distinguished by the 

 stronger, closer, and more irregular punctuation, the interior of the punctures being at 

 the same time piceous. A specimen, obtained at Cordova by Herr Hoge, differs from 

 the normal forms in having five instead of four spots on each elytron, besides another 

 one across the suture at the place where in the other specimens the sutural band is 

 slightly widened. The spots in this specimen are also much larger than is usually the 

 case ; the extra spot is situated close to the first one below the base. 



15. Leptinotarsa signaticollis. (Tab. xill. fig. 20.) 



Leptinotarsa signaticollis, Stal, Diagn. 1859, p. 317; Monogr. Chrys. Amer. p. 163 \ 



Eab. Mexico \ Izucar, Puebla (Salle). 



The elytra in this species are generally of a uniform testaceous colour, with the suture 

 narrowly black, and the punctuation very irregularly distributed, with a slight tendency 

 to arrangement in rows near the suture. I have besides these specimens, which agree 

 with Stal's description, two others before me, formerly in Sturm's collection, and labelled 

 by him Chrys. nigropunctata, which are much larger than usual ( ? ), and having the 

 elytra crowded with innumerable and large punctures, which in one of them form a 

 number of closely approximated longitudinal thick vitta?. The antennae are also much 

 shorter than in the males, and only extend to the base of the thorax. The very 

 irregularly arranged punctures however, will, separate the present species from the 

 following ones, even when the elytra show stripes as in the specimens just mentioned. 

 The last joints of the antennas in L. signaticollis are very thickened, and distinctly 

 broader than long. 



