22 STRUCTURE OF CERTAIN DIPTEROUS LARV^. 



tubercle at each outer corner. Stigmal plates about one-half their 

 (Hitiiieter apart, each with three straight slits, directed somewhat 

 toward each other, but also downward. 



This species has been recorded in Holland and other parts of 

 Europe as very injurious to sheep. The larvae, feeding in matted 

 parts of the wool, start sores on the skin, which they invade and feed 

 on the matter, producing ugly, ulcerated patches. 



Mr. W. W. Froggatt has recorded a species of CallipJiora (oceanica) 

 as causing similar sores on sheep in New South Wales. 



Meinert has reared another Lucilia (L. nohilis) from larvae taken 

 from the ears of a sailor. 



Lucilia sylvarum Meig. 



(Plate III, figs. 48-51.) 



In general similar to L. sericata. A bilobed head, two mandibles, 

 about eight lobes to the anterior spiracle, surface of body mostly smooth. 

 A roughened ring around each segment; beginning with the sixth 

 segment this ring is broadened below, and traversed by a narrow 

 smooth space; the dorsal part of these rings for the last few segments 

 is very weak and obscure. The last segment is rather short, with the 

 stigmal field hardly concave; the upper lip with three small, subequal 

 tubercles each side, smaller than in L. sericata, lower lip with two 

 tubercles each side, and a median pair, removed from edge of lip. 

 Anal area rather prominent, roughened, with two small, rounded, 

 approximate, smooth tubercles below, and one pointed and roughened 

 at each outer corner. Stigmal plates about one-half their diameter 

 apart, each with three straight slits, pointing somewhat toward each 

 other, but not so much as in Calliphora; an approach to the condition 

 of Chrysomyia. 



Myospila and Auchmeromyia. 



Portchinski has figured Myospila, showing that it goes in the 

 Calliphorinse, and Newstead has figured the Congo floor-maggot, 

 Auclimeromyia luteola Walk., which also belongs here. 



Gedoelst has figured larvae of Cordylohia, which is considered to 

 be a calliphorine, but these larvae appear to be much nearer to the 

 CEstridae. 



Muscm^. 



According to the larval characters the Muscinae form a very sharply 

 restricted group. There is but one great hook, and the posterior 

 stigmal plates have three sinuous slits; characters not found (as far 

 as known) in any of the allied forms. The anterior part of the bod}" 

 is more slender than in CallipJiora and Sarcophaga. The spinose 

 parts of the segments are confined to the ventral surface; the anal 



