126 



ENTOMOLOGY. 



Family Phoridae. Antennae 1-jointed, with a long bristle; fem< 

 attened. Phora incrussata Meigen, of Europe, lives in hives 



femora 



flattened. Phora incrussata Meigen, of Europe, lives in laves on 

 decaying bee-larvae, and different species feed on both living and 

 dead insects, and sometimes decaying vegetable matter. 



FIG. 146. Phora incrassata. a, larva; 6, pupa-case. 



Family Asteidae. Front bristly above. Asteia tennis Walker. 



Family Phytomyzidae. Front bristly. Phytomym clematidis Loew. 



Family Agromyzidae. Front with strong bristles; middle tibuu 

 with a terminal spur. Agromyza coronata Loew. 



Family Oscinidae. Front without bristles, the crown having only 

 a few short ones; border of the mouth without vibrissse, which, how - 

 ever, are represented sometimes by a small hair on each side 

 Middle tibite with small spurs; all the tibiae without an erect bristle 

 on the outer side before the tip. Costa of the wings without bristles 

 The auxiliary vein is completely wanting; the anterior of the two 

 small basal cells is united with the discal cell, the posterior one is 

 totally wanting. The species of Chlorops are injurious to cereals, 

 the maggots living in the stalk. Meromyza americuna Fitch. 



Family Drosophilidae. Front with bristles above; face with distinct 

 sub-antenual furrows; at the border of the mouth there is a feeble, 

 frequently rather indistinct small vibrissa. Middle tibiae with very 

 feeble spurs; on the outer side of the tibite there is either a very 

 small or no erect bristle before the tip. 



Wings without bristles on 



FIG. 147. Apple-worm and its fly. 



the costa; the first longitudinal vein is exceedingly abbreviated; of 

 the auxiliary vein there is only a rudiment: the discal cell is usually, 

 but not in all genera, united with the foremost of the two small 

 basal cells. Claws and pulvilli very small. The larva of an unde- 

 termined species of Drosophila (Fig. 147) injures stored apples, 

 while Drosophila ampelophila Loew infests pickled fruit. 

 Family Geomyzidae. Vibrissoe distinct. Diastata pulchra Loew. 



