316 THE CANADIAN ENTOMOLOGIST 



NEW NORTH AMERICAN SPECIES OF THE 

 GENUS GONOMYIA Meigen. 

 (TiPULiD.E, Diptera) 



HY CHARLES P. ALEXANDER, ITHACA, N.V.* 

 •Contribution from tho Entomological Laboratory of Cornell University. 



The species herewith ciescril)ed as new belong to the subgenus 

 Gonomyia, the nieml)ers of which ha\e the cell Ri of the wings 

 present. As has been indicated in earHer papers it is almost im- 

 possible to identify isolated females in this genus and in most of 

 the related Eriopterine genera, but the genitalia of the male sex 

 offer remarkabh- clear-cut characters for the separation of closely 

 related species. 



("•enus Gonomyia Meigen. 



Gonomyia (Gonomyia) florens, sp.n. 



Male — Length 4-4.1 mm.; wing 5.4-5.C muL 



Female — Length 5.8 mm.; wing 0.8 mm. 



Rostrum yellowish brown, the palpi dark jjrown. Antenna? 

 long and slender, the scapal segments yellow, the first flagellar 

 segment brown, yellowish at the base, remainder of the antenuie 

 dark brown; flagellar segments rather elongated, slightly enlarged 

 just beyond the base. Head yellow with a brown median line. 



Mesonotal pra^scutum light yellow with three dark chestnut- 

 brown stripes which are almost confluent behind; f seudc sutural 

 fovea^ very large and prominent; lateral margin of the sclerite 

 yellowish becoming more whitish beyond the pseudosutural fo\ea^; 

 scutum with the lobes rich chestnut brown, the inner edge adjoin- 

 ing the median area yellow, the lateral margin yellowish; scutellum 

 and postnotum light \ellowish to a large extent. Pleura pale 

 yellow with a dark brown stripe fnjm the ventral portion of the 

 cervical sclerites running back to the base of the abdomen, enclosing 

 the base of the halteres; mesosternum pale brown; the pale pleural 

 stripe with a sparse whitish bloom. Halteres light brown, the 

 knob pale. l>egs with the cox;e pale >ellow; trochanters brown; 

 femora light brownish yellow; tibiie yellowish brown; tarsi brown. 

 Wings with a strong yellowish tinge, the stigma indistinct, the 

 costa yellow, remaining veins brown. Venation: .SV moderately 

 long, ending just before or opposite the origin of Rs; Rs gently 



September. lOlti 



