68 
occuiring also in that stage in May, June, and July. It lias been 
seen to lay eggs July 1; occurs in the larval stage certainly from 
» line 11 to July 21; has pupated by July 24; and has emerged as 
an adult from August 11 to October 5. 
. Robusius has also been seen abroad as an imago in early 
spring. Larvae of various ag’es and pupae were collected in South 
Carolina August 20, and a single adult emerged a few days later. 
We have obtained the imagos of S. ochrevs in May, June, and 
July, and.have found them living as late as August 1. The sexes 
" n a 11 p *t . ^ ^ and eggs have been laid on 
the oOth of July, full-sized larvae and others partly grown also 
occurring at that time. 
In nature this species breeds in the large dense root-bulbs of 
the common club rush, Scirpus fluviatilis-a coarse grass-like plant 
extremely abundant in the lowest marshy prairies. Whether pu¬ 
pation occurs in the cavity of the bulb or in the earth adjacent 
is not yet certain, although the fact that a dead beetle was found 
by us within a larval burrow where it had evidently perished after 
transforming, is evidence that the larva does not desert the bulb 
before pupation. 
Elaborate experiments made at the office and on the University 
farm, failed to show that this beetle could breed in corn. Hills 
of com with vnieh imagos had for several weeks been enclosed 
and upon w hick they fed with the greatest freedom, were not in¬ 
fested by the larvae of this species, neither could eggs be found 
about oi upon them, although the beetles were pairing when im¬ 
prisoned. 
Pci tincix has been found abroad as an imago in early spring, 
making its attack upon the young corn. It was bred by Dr. Kel- 
licott,* as I am informed by a recent letter from him, in July and 
August of three successive years (1880-1882).f In our ow r n col¬ 
lections the imago of this species has been taken only in July. 
above are the only species wdiose immature stages have 
been observed, but dates of occurrence and time of attack of the 
imagos of other species of the genus indicate for them very sim- 
ilai, if not identical, life histories. Cciriosus T has been collected 
by us from June 4 to July 1, and again September 16. Sculptilis 
has likewise occurred in June, July, and September. Scoparius 
we have found on corn and grass from June 16 to July 7; and 
placid us from May 20 to August 5, the latter date from northern 
Illinois. 
^Concerning this species, Dr. Kellicott writes me¬ 
an oblique burrow m the base of the plant and pupates 
“It is abundant at Buffalo, 
in the same. 
The larva cuts 
lacustris KelllC0tt also informs me th at he bred costipennis in July 1881, from the club rush, Scirpus 
+ Since the above was written we have repeatedly bred cciriosus from 
tions made in the lower part of a common sedge, Cijj)erus strigosus. 
eggs deposited in perfora- 
