DIPTERA 787 



Superfamily Muscoidea. 



The Bot-flies of Horses, p. 864. Family GASXROPHiLiDiE 

 The a^strids. p. 866. Family (Estrid^ 

 The Phasiids. p. 868. Family Phasiid^ 

 The Megaprosopids. p. 869. Family Megaprosopid^ 

 The Blow-fly Family p. 869. Family Calliphorid^ 

 The Sarcophagids. p. 870. Family Sarcophagid^ 

 The Tachina-flies. p. 871. Family Tachinid^ 

 The Typical Muscids. p. 872. Family Muscid^ 

 Section II. Pupipara. 



The Louse-flies, p. 874. Family Hippoboscid^ 



The Bat-ticks in part. p. 875. Family Streblid^ 



The Bat-ticks in part. p. 875. Family Nycteribiid.e 



The Bee-lice. p. 876. Family Braulid^ 



TABLES FOR DETERMINING THE FAMILIES 

 OF THE DIPTERA 



Table A.— DIPTERA WITH WELL DEVELOPED WINGS. 



A. Flies in which the abdomen is distinctly segmented, and the two legs of each 

 thoracic segment are not widely separated. Habits various, but the adults do 

 not live parasitically upon either birds or mammals. 



B. Antennae consisting of more than three segments. (Note that a style or 



arista borne by the third segment is not counted as a segment.) 



C. Antennae consisting of more than five distinct segments, the segments 



beyond the second not consolidated; cell ist A of the wings but slightly 



narrowed at the margin of the wing, if at all; palpi usually elongate, and 



composed of from three to five segments. 



D. Small moth-like flies, with the body and wings densely clothed with 

 hairs and scales. Wings with from nine to eleven longitudinal veins 

 but with no cross-veins except sometimes near the base of the wings. 



(Fig. IOI4). p. 801 PSYCHODID^ 



DD. Flies that do not resemble moths in appearance. 



E. Mesonotum with a distinct V-shaped transverse suture. 



F. The radial sector four-branched, p. 796 Tanyderid^ 



FF. The radial sector with less than four branches. 



G. With only one anal vein. p. 796 Ptychopterid/E 



GG. With two anal veins, p. 798 Tipulid^ 



EE. Mesonotum without a distinct V-shaped suture. 



F. Media three-branched (Anisopus and Trichocera). p. 797.. 



Anisopid^e 



FF. Media simple, two-branched, or wanting; cell M2 is not divided 

 by a cross-vein. 

 G. Wings with a network of fine lines near the outer and inner 



margins in addition to the veins (Fig. 1048). p. 824 



Blepharocerid^ 



GG. Wings without a network of fine lines. 



H. The margin of the wings and each of the wing- veins fringed 



with scales (Fig. 1019). p. 8o± Culicid^ 



HH. The wing-veins with or without a fringe of hairs, but 

 without a fringe of flat scales. 



I. Anal veins entirely wanting; vein M wanting or at most 



represented by a single unbranched fold. p. 813 



Cecidomyiid^ 



II. Anal veins usually present or represented by folds; vein M 

 present or at least represented by a fold which is usually 

 branched. 



J. Ocelli present. 



K. Antennas shorter than the thorax; coxas not uix- 

 usually long. 



