472 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
dopterus in the nature of the elytral sculpture, this being more regular 
than in the recent North American species of Colaspis. By deserip- 
tion, the present species is close to Scudder’s C. luti but has relatively 
a much shorter prothorax. The figure of C. lute represents the abdo- 
men as having six segments. 
COLASPIS PROSERPINA, Sp. NOv. 
Plate“) fet 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. FElytron 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. 9,000) 
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. 
