56 Bulletin 126. 



plate V, would reveal many differences. A detailed description 

 of this fly is unnecessary here. It is a grayish-black, two-winged 

 fly, not quite so large as, but closely resembling the well-known 

 house-fly, of which it is a near relative. 



The progeny which hatch from the eggs of flies are known as 

 maggots. To see the young, or the maggots, of this raspberry 

 pest, it will be necessary to carefully split open an injured shoot ; 

 in June the maggot will usually be found below the girdle in the 

 lower portion of the shoot. The maggot is slender, white, 

 smooth, footless, and measures from 8 to 10 mm. in length when 

 full-grown. Its black hook-like mouth parts may be indistinctly 

 seen through the semi-transparent skin of the head. Its blunt 

 caudal end has around its margin several small fleshy pointed 

 tubercles, and from the centre project the two elevated brown 

 spiracles. 



Its Name. 



This new raspberry pest belongs to that peculiar order of insects 

 — the true flies — known as the Diptera. It is one of the Anthom- 

 yiians, and is thus closely related to the cabbage and the onion 

 root-maggots discussed in bulletin 78. In 1886, Mr. Fletcher 

 bred the adult insect, but did not have an expert determine its 

 name. Others who have noticed its work have failed to get the 

 fly. We also failed in our first attempt to breed the insect in our 

 cages, but finally succeeded in obtaining several flies from mater- 

 ial collected in the field early in the spring. As the females of 

 many of these Anthomyiian flies are so near alike, it is necessary 

 to study the males to get specific characters for determination. 

 We sent two males to a specialist in England, Mr. R. H. Meade, 

 but they arrived in such a mouldy condition that it was impossi- 

 ble to determine their name, except that they doubtless belonged 

 to the genus Phorbia ; this is the same genus to which the cab- 

 bage and the onion maggots belong.* 



*Mr. Meade wrote us : ' * The two Anthomyiids which you sent me belong 

 to the genus Phorbia ; but do not seem to be identical with any European 

 species that I know of. They are so covered with mould, however, that 

 most of their characteristic f eatiures are destroyed. * ' 



