158 
June, the beetle appearing in that month and continuing sto issue 
from the ground till fall. On the 19th of May, in Union county, 
among a considerable number of root-worms of other species, I 
found a few half-grown larve of this, easily distinguished from those 
of Scelodonta pubescens, with which they occurred, by their greatly 
inferior size at that time. On the 28th of June I received from 
Mr. Earle specimens of this species in both the larva and imago 
stages, the latter having just emerged. The adults were now abun- 
dant on the leaves of strawberries, and many also occurred on the 
foliage of the grape, adjacent to the strawberry field, associated, in 
both cases, with a dark, steel-blue species of the same genus (Colas- 
pis tristis). 
An assistant, Mr. Garman, obtained adults by sweeping stubble 
fields at Du Quoin on the 4th of July, and sent from Anna, on the 
9th, specimens of larve, pupe and adults all obtained from the 
earth. Two of the latter were from oval cells in the ground, within 
which they had lately transformed. He also found adults very 
common on the foliage of the strawberry at this date, and reported 
the imagos abundant on grape leaves on the 11th. By the 18th, all 
the larve and pupx had emerged, but the adults were found in 
sweeping the leaves of the strawberry where they continued common 
until August Ist. It is especially worthy of remark that the only 
field in which Colaspis larve were found had been set in the spring 
of that year, the ground having been previously in wheat. 
Our collections of the adults made in Northern and Southern 
Illinois, represent only the months of June and July, but in the 
course of extended and careful search of the earth in a considerable 
number of strawberry fields made in the months of September, 
October, November and December in parts of Southern Illinois now 
known to be infested by this species, not a single specimen of Colaspis 
was encountered. Among these fields was the one from which the 
larve, pup and young imagos were sent me in June; but in which a 
long search in early September failed to discover a single specimen in 
any stage. These and other fields in the region in which the larve 
had occurred, were also most carefully hunted over early in Decem- 
ber, by digging up the earth, and raking up the mulch, but not a 
single Colaspis occurred in any stage, even where strawberries were 
raised among grapes.* 
The above facts warrant us in assuming that the species is 
single-brooded, that the larve are hatched in spring (whether from 
eggs laid in autumn or from those deposited by hibernating beetles 
is not yet known,) that they get their growth in June or July, and 
that the adult beetles may be found during the remainder of the 
season, at first in strawberry fields and afterwards in the vineyards, 
and indeed, quite generally distributed. They are at this season, 
_* Perhaps exception should be made of a single larva found near Cobden, associated 
with those of Scelodonta. This was clearly of the Colaspis type, having every peculiarity 
of Colaspis brunnea, but was very much larger than full-grown specimens of that species 
taken together with pups, and themselves evidently about to transform; and was further 
remarkable forthe strong, conspicuous brown hairs borne on brown tubereles, all over 
the dorsal surface. This specimen,somewhat shrunken in alcohol, measured a little over 
5 mm.in length, by 3 mm.in width. It was dead, or nearly so, when taken. Without 
fuller knowledge of the larve of the genera of this group, I cannot suggest a determina- 
tion for this specimen. 
