50 
Calendar —Continued. 
Eupelmus allyni. 
Cata¬ 
logue 
No. 
Place of Collection. 
Date of Collec¬ 
tion. 
Date of Emergence. 
2194.... 
Villa RidcP ___ 
June 
3,1884.... 
June 
13-July 1,1884.... 
Arm a. ... 
4,1884.... 
t ( 
13— “ 18,1884.... 
9'MQ 
Anna. _ _ . ...... 
6.1884.... 
22— “ 10,1884. 
7,1884.... 
20,1884 . 
24,1884.... 
July 
t « 
10-26,1884,. 
4566.. .. 
4349.. .. 
25,1884.... 
26.1884. 
t < 
30,1884.... 
t t 
10,1884.. 
July 
7,1884.... 
i t 
7,1884. 
4'JOO • • • • 
3806.... 
Aug. 
7,1883.... 
Aug. 
17,1883. 
As a general result of these observations, we may say that, with 
the single exception of Pteromalus pallipes, all the parasites bred by 
us from wheat containing the Hessian fly emerged before the August 
following the laying of the eggs from which they hatched, and that 
the former species survived the winter in the flaxseeds of the dies, 
not emerging until the succeeding summer. 
4. Note on the Wheat Midge. 
(Cecidomyia tritici, Kirby.) 
Order Diptera. Family Cecidomyid^e. 
(Plate IV. Fig. 3.) 
This frightfully destructive enemy of wheat appeared during the 
last summer in extreme Northern Illinois in numbers and under cir¬ 
cumstances to demand the attention of the economic entomologist; 
and although its life history and habits have long been well known, 
its occurrence in the West in numbers sufficient to attract attention 
has been so rare, that very little is known of it by the farmers oi 
our State. It consequently seems best to give here a brief report 
of the observations made this summer in the wheat fields of Mc¬ 
Henry county, together with a synopsis of its life history and such 
recommendations of remedial measures as are warranted by our 
present knowledge of the insect. 
My attention was first called to its prevalence in that, region by 
a letter, dated July 25, from Mr. R. W. Lane, of Chicago, who 
transmitted heads of wheat from Genesee Depot, Wisconsin, which 
I found to be seriously infested by the midge. Thinking it possi¬ 
ble that the same insect was at work in adjacent parts of Ilhnob, 
I visited the fields of the Fox River valley from Elgin northward, 
on the 80th and Blst of that month. In every field but one which 
I entered in the vicinity of McHenry and Ringwoocl, where spring 
wheat only was raised, I found the midge larva upon the heac s 
wheat, usually in only here and there a blackened head, m son 
