tT 
127 
32 Clypeus emarginate; surface with short yellowish recumbent hair; 
penultimate ventral of male vaguely concave at middle; thorax with 
margin coarsely serrate, coarsely and densely punctate. 17-20 mm. 
crenulata, Frohl. 
Gv MCUs eMLINGr Fads ciiey sites seein ves Sees Rb Me oad ae ala ale lone g'a, ai hele. ny 34 
33 Subcylindrical, rufotestaceous; clypeus emarginate; thorax moderately 
punctate, with smooth median line; last ventral of male longitudinally 
subearinate at middle, anterior margin elevated each side, penulti- 
mate with sharply limited cupuliform concavity, its margin rising 
into an acute rugose tuberosity on each side, hind tibial spurs slen- 
CELT; el Lge epee eaten rm etre calor che ten cate) gee, ofa averd Wetoniaries soe inepta, Fabr. 
34 Surface with yellowish hair long on head, thorax, and about scutellum, 
short on remainder of elytra; thorax coarsely, closely punctured, last 
two ventrals of male broadly transversely impressed, anterior margin 
of last ventral elevated, penultimate with a short acute transverse 
carina near the front margin. 11.5-15 mm.............. tristis, Fabr. 
THE GREEN JUNE BEETLE. 
(Allorhina nitida, L.) 
(Plate XIIL., Fig. 7.) 
The larva of the green June beetle, Allorhina nitida, commonly 
known as a white grub where it occurs, is distinguishable from the spe- 
cies of Lachnosterna and Cyclocephala by its somewhat larger size when 
full grown; by the thick covering of short stiff hairs easily visible to 
the naked eye; but especially by the difference in its method of locomo- 
tion upon a hard surface. The common white grubs (Lachnosterna ) 
creep only by means of their legs, dragging the heavy abdomen clumsily 
along; but the larva of the green June beetle, when thrown upon a hard 
surface, turns immediately upon its back, and moves somewhat easily 
in this position by alternate contraction and expansion of the segments 
of the body, using the stiff hairs upon the back as an aid. 
This is a southern species, and in the Southern States largely re- 
places Lachnosterna, its larva being there known as the white grub. In 
Central Illinois it occurs but rarely, but becomes noticeably abundant 
in the southern part of the State, where it has been occasionally re- 
ported as injurious in a small way. Although it has not been found in 
corn fields, its food and habits are such as to make it altogether likely 
that under favoring circumstances it might injure corn in the same 
manner as the Lachnosterna larva—or rather as the larva of the Cyclo- 
cephala, which it more closely resembles in its life history. The grub is 
normally a grass insect, but infests likewise strawberry fields, and has 
been found by Dr. Riley to feed in confinement upon the roots of wheat. 
Tt seems to be less dependent upon living vegetation than even the white 
grubs, apparently living much more generally upon a rich soil. Indeed, 
the beetles seem to be attracted to manured land when about to lay 
their eggs, or to that which has been heavily mulched or contains an 
unusual amount of decomposing vegetation.* Townsend has found them 
living in clean earth under circumstances to indicate a carnivorous 
habit.+ ; 
The life history of this insect is, as already intimated, different 
from that of Lachnosterna, especially in the fact that pupation of the 
* Bull. 23 Md. Agr. Exper. Station, 1893, p. 79. 
+ “Insect Life,’ Vol. IV., p. 25. 
