1 882.] 



Entomology. 



?47 



of follows, and finally the review is given of the publica- 

 tions. There are 107 publications recorded in this volume, of 

 which number more than one-third treat directly or indirectly of 

 the grape Phylloxera. The record is an evidence of the increas- 

 ing interest felt in this branch of natural history. The most im- 

 portant contribution of the year 1879 appears to have been L. 

 Courchet's " Etude sur les galles produites par Us Aphidiens." 



A new Depredator infesting Wheat-stalks. — Under the 

 title of Isosoma allynii, Professor G. H. French, of Carbondale, 

 111., describes what he believes to be a new wheat pest, in the 

 Prairie Farmer, for Dec. 31, 188 1. He has been kind enough to 

 send us types of this new species, which, as we suspected from 

 the description, prove to be not Isosoma, but a species of Eupel- 

 mus parasitic doubtless on some of the wheat-stalk feeders and 

 probably on some species of Chlorops. A detailed description 

 published in the Canadian Entomologist 1 Jan., 1882) of this " Iso- 

 soma ally nii" shows also that Professor French drew it from the 

 Eupelmus. The error would have loss significance but for the 





tin 





related by 

 We hav< 



past from specimens received from Tennc 

 and Missouri. The larvae were first received in 

 June, 1880, passed the winter in the pupa state, 

 and issued as adults in March and April, 1881. 

 Specimens received the present season have 

 issued in December, induced doubtless by the 

 long protracted warm weather which gener- 

 ally prevailed in those sections. Although 

 congeneric with the Joint- worm (Isosoma 

 hordei) of Harris and Fitch, it differs widely 

 from the latter in habits and appearance. The 

 Joint-worm forms a gall-like swelling at a joint 

 near the base of the stalk, while the species 

 under consideration feeds on the interior of 

 the stalk between the joints higher up without 

 - ng. Tin ■ ■ 



and 



th.i 



the 



joint-worm fly, and is perfectly smooth upon the dorsum of the 

 thorax, while the latter presents a marked punctation ; moreover, 

 the customary pronotal spot in the new specie- is large and ycl- 



