18SL.} 127 



Until this year Hemichroa rufa was supposed to have no <^, but 

 out of some ninety specimens of the species that I bred in May, two 

 proved to be <$ . As, doubtless, Mr. Cameron will describe this sex in 

 his forthcoming work on these insects, I refrain from doing so. 



On July 19th, 1S80, I found a Fenusa larva mining a blotch in a 

 leaf of Fopulus nigra. In a day or two it went to earth, and the 

 imago was bred on June 1st of this year, the insect having been more 

 than ten months under the soil. It proved to be Fenusa hortulana, 

 El. As it differed slightly from the published descriptions, I sub- 

 mitted it to Mr. Cameron, who kindly examined it, and confirmed my 

 identification thereof. In July last I found another larva on the same 

 tree, at Crown East, and three others at Broadheath and Hallow. 



In the first third of this month (September) I succeeded in 

 collecting twenty larvae of Fhyllotoma ociiropoda, a number only once 

 ibefore equalled in one year. It seems not to occur in every place 

 where its food-plant (Populus tremula) is common ; but I have found 

 it at Monk Wood, Trench AYood, and Crown East Wood. 



My local list of Tenthredinidcs now numbers 130 species, in the 

 investigation of which I have experienced many delightful hours. 



To Mr. Cameron my thanks are due for all, as until he determined 

 my captures and assisted me with types, I knew by name not more 

 than six species. 



Worcester : September, 1881. 



ON PARTHENOGENESIS IN TENTHREDINID&. 

 BY J. E. FLETCHER. 



Having continued my experiments in this subject during the 

 current year with virgin $ saw-flies, I offer the following notes : — 



Hemichroa rufa. — The dozen larvae of this species mentioned 

 (Ent. Mo. Mag., xvii, 180) as having spun up, attained the perfect 

 state in May last, all $ . Notwithstanding this, the species is not 

 entirely without $ , as will be seen in another place. 



Croesus varus. — Two ? were bred in May, and deposited eggs 

 from which larvae hatched, but only two reached the imago state 

 —both ? . 



Nematus salicis. — From a specimen bred in May I obtained five 

 larvae, three of which spun up, and yielded <$ imagines. 



The following were tried, but none of them produced ova : — 

 Trichiosoma vitellines, Dineura Degeeri, Nematus croceus (2), Hemichroa 

 rufa (2), and two of the parthenogenetic brood of the latter above 

 mentioned. 



Worcester: September, 1881. 



