472 bulletin: museum of comparative zoology. 



dopterus in the nature of the elytral sculpture, this being more regular 

 than in the recent North x\merican species of Colaspis. By descrip- 

 tion, the present species is close to Scudder's C. luti but has relatively 

 a much shorter prothorax. The figure of C. luti represents the abdo- 

 men as having six segments. 



Colaspis proserpina, sp. nov. 

 Plate 11, fig. 2. 



Form moderately elongate. Head without definable sculpture, eye 

 elliptical, antenna poorly preserved but evidently long, about half 

 the length of the body. Prothorax simply roughened, the separate 

 punctures not distinguishable. Meso- and metasternum, their side- 

 pieces and abdomen nearly smooth. Elytron roughened as if sculp- 

 tured with partly obliterated irregular punctures after the manner of 

 the recent C. chrysis, though less deeply. Legs too poorly preserved 

 for description. Length, 6.10 mm. 



Described from one specimen with counterpart. 



Type.— No. 2,624, 2,625 M. C. Z. Florissant, Col. (No. 9,006 

 and 9,103 S. H. Scudder Coll.). 



The generic reference is open to doubt. The insect seems to belong 

 to the Eumolpini and near Colaspis but the sculpture is not matched 

 in my series of recent forms. Most of the upper surface seems to be 

 rough as in C chrysis while the smooth side-pieces of the meso- and 

 metasternum are like Rhabdopterus. True generic characters are 

 lacking. It differs from the other Florissant species described as Colas- 

 pis in the combination of size and sculpture. 



Chrysomela vesperalis Scudder. 



The specimen with counterpart, No. 2,627, 2,628 M. C. Z. (No. 

 11,264 and 13,649 S. H. Scudder Coll.), referred here, is shown in side 

 view. It has altogether the form of Chrysomela and answers the de- 

 tails of the original description. The elytral punctuation in the 

 present specimen is fine, a point not specified by Scudder though natu- 

 rally inferable from his figure. 



