ORDER DTPTERA 138 



through .1 T-shaped opening, <>r rarely through a tr 

 renl between the seventh and eighth abdominal sesmi 

 The foUowing families, to and including the Xylopl 



og i" Section I. Brachycera, in which the antennae 

 are short and 3-jointed: 



•nily Lonchopteridae. —Wings with the three basal cells of moder 

 ate Bize, and of nearly equal Length; antennas with an apical bristle. 

 Ijonchoptcra riparia Meig, 



l':iiuil\ Dolichopodidae. — Firsl basal cell rather short, the Becond 

 united with the discal cell, the third small; auxiliary vein running 

 into ili<- firel longitudinal vein; third longitudinal vein simple, the 

 fourth sometimes furcate; n<> intercalary vein. Hypopygiura sym- 

 metrical, benl under the abdomen; empodium small, membrana- 

 ceous, linear. Generally metallic green, brisk, small, restless flies 

 which devour other insects. Dolicfi inut Wied. 



Family Empidae.— Body rather long; head rounded, the eyes in 

 the males touching each other above; third joint of antenna' sunple, 

 with a terminal style, or a terminal or dorsal bristle. These flies are 

 voracious, attacking other flies. Ehnpuan I ew. 



Family Cyrtidae. — Head often minute, tin . er\ large and 



ting above; thorax and abdomen much inflated; tegulae vaulted, 

 large; proboscis often very long. Certain of th< 

 sit ii- in spiders or their cocoons. J 

 kit ttii i >. Sacken. 



Family Scenopinidae. — Three basal cells very large; third joint of 

 the short antenna' without style or bristle. Larva verj '. 

 slender; occurring under carpets, and probably feeding 



moths and Psocids. 



Family Therevidae. - Differing from A-ilid.c in the labella bei 

 not horny, hut fleshy; antenna' short, with a terminal stj le of varia- 

 ble form imes wanting. Larvse like those of Scenopinus, 

 with the segments in most of them constricted, the body appearing 

 as if composed of nineteen segments behind the head. 



/>/<■■ pi I, new 



I'amily Bombylidae.— Three basal cells of the w imr much i 

 d. w itli usually four posterior cells, and the third. joint of the 

 antenna' not ringed; the proboscis is long, and tin in most 



■'• specii ely hairy. They are ra r\ -'w ift on the 



wing,_ often hovering motionless in the air. and then' darting away 

 as quick as a flash. The larva' of Bombylius an 

 those of Syskecf I 1 1 Sacken and '. i 



feeding on the eggs of locusts (Camnula and < lalopten i 



Family Nemestrinidae. Many have winL r s with num. 

 veins, -<. as to be almost net-veined. In the African ; ' 



■ fly only about two-thirds of an in< the 



proboscis, which it uses to suck the nectar froi er of 



Gladioli, etc., is nearly three inches long. Th .'/ 



newa dbteura deposits her eggs within the burn \nthaxia. a 



Buprestid beetle; the freshly ■ hatehed larva diffi - ngularly 



from older larva', the sixth to twelfth segments h provided 



with a pair of hooka, and they are suppoa 



