i 



182 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [Bull. 



96. Antennae and mouth parts present 97 



Antennae and mouth parts absent STREBLIDAE 



97. Antennae consisting of six or more freelj^ articulated segments 98 



Antennae consisting of at most three freely articulated segments. .104 



98. Mesonotum without a complete, V-shaped suture .99 



Mesonotuni with a complete V-shaped suture Tl PL) Li DAE 



99. Eyes meeting over the antennae 100 



Eyes widely separated above the antennae 102 



100. Abdomen enormously swollen, the apical four segments slender; ter- 



mite guests CECIDOMYIDAE 



Abdomen normal 101 



101. Scutellum and halteres present : SCATOPSIDAE 



Scutellura and halteres absent SCIARIDAE 



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



PSYCHODIDAE 

 Not termite guests 103 



103. Halteres present CHIRONOMIDAE 



Halteres absent MYCETOPHILIDAE 



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



posterior femora robust and laterally compressed PHORIDAE 



Antennae with two or three quite evident segments; posterior femora 

 not laterally compressed 105 



105. Frontal lunula present 106 



P'^rontal lunule absent EM PI DAE 



106. First segment of the posterior tarsi short and swollen. . . .BORBORIDAE 

 First segment of the posterior tarsi longer than the second segment 



and not swollen 107 



107. Arista with long, sparse rays DROSOPHILIDAE 



Arista pubescent or bare; third antennal segment orbicular; wings 



mutilated by the fly HELOMYZIDAE 



