412 



DIPTERA. 



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

 Anthom^'ia ceparum, besides more important respects, in liaA-- 

 ing blaclv wings witli 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. \y dcpOsitS itS CggS 



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 LoncJio;a, Osten Sacken refers, Avith 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 ; «, the larva ; b, 

 the pupa) is curved, 

 cylindrical, tapering 

 nearly alike towards 

 each extremity, 

 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 incli long when fnll}' 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 



