412 



DIPTEKA. 



of Wiedemann (Fig. 333 ; a, larva). The fly differs from the 

 Anthomyia ceparum, besides more important respects, in hav- 

 ing black wings with three broad curved bands. The maggot 

 feeds in the root thus killing the top of the plant. 



A species of Trypeta, according to F. Smith, which in Brazil 

 is called the "Berna" fly, deposits its eggs in wounds, both 

 on man and beast. "It is remarkable from having the apical 



segment of the ab- 

 domen elongated 

 into a long oviposi- 

 tor. Mr. Peckolt 

 says the negroes 

 suffer much from 

 the attacks of this 

 fly, which frequent- 

 a Fig. 333. ty deposits its eggs 



in their nostrils whilst they are sleeping, and such are the 

 effects of its attacks, that, in some cases, death ensues." 

 (Transactions of the Entomological Society, London, 1868, 

 p. 135.) 



To the genus Lonchcea, Osten Sacken refers, with consider- 

 able doubt, a fly, which I have found in abundance, raising 

 blister-like swellings on the twigs of the willow. They were 



fully grown in April. 

 The larva (Fig. 334, 

 fly ; a, the larva ; 6, 

 the pupa) is curved, 

 cylindrical, tapering 

 nearly alike towards 

 each extremity, 

 Fig. 334. though the thoracic 



region is the thickest. The rings are thickened upon their pos- 

 terior edges, so that they appear contracted in the middle. It 

 is glassy green, with two little elongated tubercles placed near 

 each other at a little distance from the end, where in the pupa 

 they are terminal. It is .15 of an inch long when fully ex- 

 tended. The pupa-case, found late in May, is oval, long, cy- 

 lindrical and obtuse at both ends ; the anterior end is more 

 blunt ; the first segment of the body is minute and forms the 



