48 



DECIDUOUS FRUIT INSECTS AXD INSECTICIDES. 



Table XXI. — Parasites reared from the grape-berry moth (Pohjcrosis viteana) feeding 

 -upon the fruit of icild and cultivated grapes at North Fast. Pa... 1906-1911. 



Family. 



Number 

 Date of emergence. ; S S of °Sf 



host. 



reared. 



BEACOTD-i:. 



Microbracon mellitor Say 



Microbracon dorsator Say 



Apanteles sp 



Ascogaster carpocapsce Vier 



Meteorus sp 



ICKSTOIONTDJE. 



Phytodietus sp 



Epiurus indagator var. nigrifrons 



Vier. 

 Orthizema sp 



Omorgus nola? Ashm. race 



Dioctes obliteratus Cress 



Dioctes obliteratus Cress 



Dioctes obliteratus Cress 



Dioctes obliteratus Cress 



Dioctes obliteratus Cress 



Ameloctonus sp 



Itoplectis conquisitor Say 



Aug. 6-19, 1909 .... Larva. . . 



Aug.3-Sept.l,1911. ...do 



Aug. 12, 1911 1... do 



Aug. 14, 1911 i Pupa.... 



Aug. 9, 1909 Larva or 



pupa. 



Julv 13, 1906. .. 

 Aug. 5, 1911... 



Larva. 

 ...do... 



July 13, 1908 ...do.. 



Sept. 13, 1907 do.. 



Aug. 16-22,1909 do.. 



Julv 13. 1906 | Pupa. 



Julv 21J1907 ...do.. 



July 22, 1908 ...do. 



Aug. 2-27, 1909 do. 



Aug. 2-27. 1911 do.. 



Aug. 24, 1909 ...do... 



Aug. 3, 1911 do. 



Previously recorded hosts. 



Many species of Coleoptera 

 and Lepidoptera. 

 Do. 

 No record. 



Carpocapsa pomonella. 

 No record. 



Do. 

 Do. 



Nola sp., a pyralid 

 Gelechia rubidella. 

 Do. 



Do. 



Do. 



No record. 



Many species of tortricids, 

 noctuids, bombycids, and 

 tineids. 



In glancing over this table it will be observed that the parasite 

 reared in greatest numbers from the grape-berry moth was Dioctes 

 obliteratus Cress. Mr. Yiereck states that the supposedly new species 

 reared by Prof. Slingerland hi 190-4 and named by Dr. Wilham H. 

 Ashmead 1 as Thymaris sling erlanclana Ashm. (see fig. 16) is the 

 same as Dioctes obliteratus Cress. The largest number of parasite 

 specimens reared by Prof. Slingerland belonged to this species: hence 

 it is very probable that it is quite widely disseminated throughout the 

 vineyards of the Chautauqua County grape belt wherever the grape- 

 berry moth abounds, and is perhaps the most effective enemy of the 

 grape-berry moth of all of the parasites mentioned in this list. 



In addition to the parasites previously mentioned as attacking the 

 larvae and pupa?, on September 7, 1906, a large number of parasitized 

 eggs of the grape-berry moth were found in a badly infested portion 

 of the vineyard of Mr. TV. S. TVheeler at Xorth East, Pa. A num- 

 ber of adults were reared from these parasitized eggs and later 

 identified by Dr. Howard as TricJiogramma pretiosa Kiley. This is 

 the first record of parasitized eggs of this insect that has come to our 

 notice, and it is the only instance hi which this condition has been 

 observed during this investigation. 



1 Can. Ent., vol. 36, pp. 333-334, November, 1904. 



