GONIOMYIA, 181 



strongly converging towards the anterior branch of the fourth 

 vein ; discal cull clo8ed in the majority of the specimens. 



Common, in summer; Washington, D. C. ; Trenton Falls, N". Y , 

 etc. Among fifteen specimens which I had before me, when I 

 first described this species, only one had the discal cell open. 



2. G. cogiiatella 0. S. % and 9- — Sulphureo-flava, fusco variegata, 

 aiitennis basi aurantiacis, in mare dense pubescentibus, verticillis brevi- 

 bus ; pedlbus unicoloribus ; cellula discoidali aperta. 



Sulphur yellow, variegated with brown ; antennje orange yellow at the 

 basis, densely pubescent and with short verticils in the male ; feet uni- 

 colorous ; discal cell open. Long. corp. 0.2 — 0.25. 



Syn. Gonomyia corjnatella 0. Sacken, Proc. Ac. Nat. So. Phil. 1859. p 230. 



Very like the preceding, but easily distinguished by the follow- 

 ing characters : The antennae of the male are covered on every 

 joint with a short, dense pubescence, which, being interrupted at 

 the articulations, makes the antennae appear moniliform ; the 

 balteres (b«th stem and knob) are infuscated ; the pleursE are 

 yellow, with a brown stripe ; the feet are uniformly pale tawny, 

 only the tips of the tarsi darker ; the discal cell is open (at least 

 in the normal specimens) ; the inner angle of the marginal cell is 

 more acute, the prajfurca running obliquely from the first longi- 

 tudinal vein ; the anterior branch of the second longitudinal vein 

 is more oblique, and therefore somewhat longer; the distance 

 between the tips of both branches of this vein is about twice the 

 length of the distance between the tip of the anterior branch -and 

 that of the first longitudinal vein ; the third vein is straight, 

 although, in its whole course, somewhat converging towards the 

 anterior branch of the fourth ; the second submarginal cell is 

 somewhat longer than the first posterior. The forceps of the male 

 (Tab. lY, fig. 18) has a somewhat different structure from that of 

 G. sidphurella. 



Hah. Washington, D. C. I had seven specimens. , 



3. G. SUl)cilierea 0. S. % and 9. — Sulphureo-flava; mesonoto 

 cinereo-fusco ; antennis nigris ; pedibus unicoloribus; celluli discoidali 

 (in speciminibus typicis) clausa. 



Sulphur yellow ; mesonotum grayish-brown ; antennre black ;* feet uni- 

 colorous ; discal cell (in the normal specimen) closed. 



Syit. Gonomyia subcinerea 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 231. 



