1885.] Entomology. 1105 
when such conflict with all that has before been known or with 
previously uniform unity of habit, still feels that the observations 
need verification, and that it is probable that both Herrick and 
Cook mistook the young Hessian fly larve for the eggs. 
Another species of Tetrastichus to which Professor S. A. 
Forbes has given the MS. name of carinatus, is briefly referred 
to as being in all probability a secondary parasite, and a single 
Microgaster is mentioned but not described, as some doubt exists 
as to whether it is parasitic on the Hessian fly, although it was 
bred from straw infested by this last. 
FORBES’ Report on THE Noxious INSECTS OF ILLINOIS FoR 1884. 
—Professor Forbes’ third report abounds in new matter of interest 
both to the entomologist and the agriculturist. Besides the 
new Cram bus feeding on the roots of the corn, two leaf-rolling 
moths are described,as well as the corn aphis, with notes on 
other corn insects. Among the, wheat insects there are fresh 
contributions to our knowledge of the Hessian fly and its parasites, 
the facts ascertained strongly suggesting the hypothesis of a 
normal completion, before harvest, of the transformation of a con- 
siderable part of the destructive spring brood of the larvae. Three 
new parasites are described, viz: Pteromalus pallipes, Pt. fulvipes, 
and Tetrastichus carinatus: The wheat midge is re-described in 
all its stages and new observations on its habits are presented. 
Several pages are devoted to the grass worm (Laphygma frugiperda), 
some clover insects are described, as well as insects injurious to 
the smaller fruits, as the apple and pear, and some shade trees. 
Though the report is a somewhat miscellaneous one it contains 
Considerable novel matter. Many of the illustrations are unequal 
and some are not so good as they should be, probably from lack 
of means afforded by the State authorities, and the lack of first- 
Class artists. The appendix is exceedingly useful, as it contains 
general indices to the first twelve reports of the State entomolo- 
gists of Illinois, the plant index being particularly useful. 
y ha - . 
to San Miguel. The swarms must be quite local, and originate 
in the “erra caliente, or tropical zone of Central America, south 
of Mexico. ; 
From Dr. A. A. Russell, of Cordova, to whom I was indebted 
