86 THE EEPOET OF THE No. 36 



The material from which the parasites given below were reared was all 

 collected at Guelph. Accordingly 'the distribuition throughout the Province of 

 most of the species is unknown to the writer. The "Red-tailed Tachina-fly," 

 Winthemia 4:-pustulata, Fab., and Apantehs militaris, Walsh, were general in 

 distribution and numerous in all the counties visited. 



The following are the sipecies of parasites reared from the Army Worm 

 at Guelph during 1914. 



Tacliinidce. 



1. Phorocera (Euphorocera) claripennis, Macq. Eeared one specimen at 

 Guelph. 



2. Wagneria (Phorichceta) seqvux. Will. Eeared one specimen at Guelph. 



3. Winthemia 4:-pustulata, Fab. Eeared in large numbers at Guelph, and 

 generally distributed throughout |the Province, farmers in all parts being familiar 

 with ithe white eggis deposited 'on the thorax of the caterpillar immediately behind 

 the head. The adults were first observed egg-layin,g on July 16th in Burford 

 Township of Brant County, and on July 17th at Guelph. Early in the seasom 

 only ome or two eggs were laid on a singtle Army Worm," hut as the season 

 advanced and the Tachina-flies increased in numiber, the piumber of eggs per 

 larva also increased. The lar,gest mumber of eggs found on one larva was 38. 

 It was noted that late in the season when the number of eggs per larva was large 

 the percentage of eggs hatchiing was smaller than earlier in the season when 

 the number of eggs per larva was smaller. Wintliemia larvae were observed to 

 pupate within the body of the host as well as without, but those which came 

 out to pupate emerged earlier than those which remained within the body of the 

 host. Parasitized Army Worms which were killed by poisaned bran mash on 

 July 22nd still contained living Tachinid larvse on July 24th. One of these Army 

 Worms was ope,ned on this date and five Tachinid larv^ were found. Four of 

 these were retained for examination, but one was placed back in the body of 

 the dead Army Worm. This larva lived. It pupated on July 26th and the 

 adult emerged oin August 8th. 



Individuals of this species were reared through as follows: 



Eggs ^hftch^d * '. ". ■. *. *. ; '. ; '. '. '. Aug. llh j I^^^^^'^^tion period 4 days. 



Larvae pupated Aug. 16th Larval period 4 days. 



Adults emerged Aug. 29th Pupal period 13 days. 



In this case out of six eggs laid on the Army Worm four adults were obtained. 



Ichneum(mid(B. 



1. Ichneumon canadensis, Cress. Eeared in considerable pumbers and ob- 

 served commonly durimg 1914 outbreak in the fields at Guelph. 



2. Ichneumon jucundus, Brulle. Eeared in considera/ble numhers and ob- 

 served dommonly at Guelph. 



3. Ichneumon, sp. This is a yellow banded form which ''has not yet been 

 satisfactorily identified to species. It was the most common Ichneumon parasite 

 at Guelph, being present in the infested fields in large numbers. 



4. Paniscus gemAnatus, Say. Eeared in numlDcrs and numerous specimens 

 captured on the wing. 



5. Mesochorus vitreus, Walsh. Eeared in numbers at Guelph. Walsh origin- 

 ally described this as a primary parasite of the Army Worm but Eiley later 

 stated that it was a parasite on Microgasters. In this case it was prtobably 

 parasitic on Apanteles. 



