27 

 PUPIPARA AND FLIES WITHOUT OR WITH ABORTED WINGS 



91. CoxEe widely separated by the sternum; usually parasitic on warm 



blooded animals 92 



Coxae approximate basally; not parasitic on warm blooded animals (ex- 

 cept Streblidae) 95 



92. Mesonotum short, resembling the abdominal segments; antennae in- 



serted in lateral grooves (p. 472) BRAULID^ 



Mesonotum and abdomen differentiated 93 



93. Head small and narrow, folding back into a groove on the mesonotum; 



prosteraum produced (p. 476) NYCTERIBIID^ 



Head not folding back in a special groove; prosternum not produced. . . .94 



94. Palpi broader than long; wings uniformly veined., (p. 477) STREBLID/E 

 Palpi elongate, forming a sheath for the proboscis; wing veins crowded 



anteriorly, weak or absent posteriorly (p. 473) HIPPOBOSCID^ 



95. Antennae and mouth parts present 96 



Antennje and mouth parts absent (p. 477) STREBLID^C 



96. Antennae consisting of six or more freely articulated segments 97 



Antennae consisting of at most three freely articulated segments 103 



97. Mesonotum without a complete, V-shaped suture 98 



Mesonotum with a complete V-shaped suture (p. 33) TIPULID^ 



98. Eyes meeting over the antennae 99 



Eyes widely separated above the antenna 101 



99. Abdomen enormouslv swollen, the apical four segments slender; termite 



guests " (p. 101) CECIDOMYID^ 



Abdomen normal 100 



100. Scutellum and halteres present (p. 131) SCATOPSID^ 



Scutellum and halteres absent (p. 118) SCIARID^. 



101. Termite guests; ocelli absent; wings with several veins. 



(p. 78) PSYCHODID/E 

 Not termite guests 102 



102. Halteres present (p. 69) CHIRONOMID^ 



Halteres absent (p. 120) MYCETOPHILID^ 



103. Antennae apparently consisting of one more or less globular segment; 



posterior femora robust and laterally compressed. . (p. 234) PHORIDiSI 

 Antennae with two or three quite evident segments; posterior femora 

 not laterally compressed 104 



104. Frontal lunule present 105 



Frontal lunule absent (p. 205) EMPID^ 



105. First segment of the posterior tarsi short and swollen. 



(p. 360) BORBORID^ 

 First segment of the posterior tarsi longer than the second segment 

 and not swollen 106 



106. Arista with long, sparse rays (p. 325) DROSOPHILID^ 



Arista pubescent or bare; third antennal segment orbicular; wings 



mutilated by the fly (p. 378) HELOMYZID^ 



