236 DIPTERA. 



SUB-FAMILY V. Anthomyiince. 



Antennal bristle naked or pectinated ; forehead narrow in the 

 males; eyes straight, naked, or hairy; abdominal bristles often 

 absent. 



A rather extensive family, much resembling the true Musddce, 

 and generally including dull-coloured and inconspicuous species. 

 Some species, not unlike the common house-fly, are common in 

 houses, especially in spring ; and others are annoying by flying 

 round our heads out of doors, and trying to settle on our faces. 

 Most of the species breed in dung, or in decaying vegetable matter ; 

 but the larvae of several species of the great genus Anthomyia mine 

 in the leaves of plants, like those of Tinece, while others again are 

 parasitic on other insects. 



ACALYPTER^E. 



SUB-FAMILY I. Scatophagince. 



Head of moderate size; forehead bristly; antennae short, 

 third joint rather long; abdomen rather short and broad, not 

 thickened behind; wings very large and broad, extending far 

 beyond the abdomen ; legs of moderate length ; male often clothed 

 with woolly hair. 



These flies frequent dunghills, etc., but will also feed on other 

 insects. One of the commonest and most familiar species is the 

 yellow downy dung-fly (Scatophaga Stercororia, Linn.), several of 

 which may be seen resting on almost any patch of freshly-dropped 

 dung. 



SUB-FAMILY II. Ortalince. 



Head semicircular, rather large, only the vertex bristly ; fore- 

 head broad ; antennae short, third joint rather long ; abdomen 

 moderately long ; ovipositor of the female somewhat projecting ; 

 wings large. 



The OrtalincB are flies of small or moderate size, often with 

 banded wings, which are met with in woods and fields. Little is 

 known of their transformations. 



SUB-FAMILY III. Trypetince. 



Head semicircular, often hairy, but not bristly near the mouth ; 

 forehead broad, bristly; antennae generally short; ovipositor 

 always more or less prominent in the female ; wings rather large ; 

 legs moderately long ; tibiae without terminal spines. 



