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iiil 



ivVTOMor.or,ic.\r, xf.ws 



A new Tropical Gonomyia (Tipulidae, Dipt.). 

 By CiiAKi-iiS P. Alexandkr, Ithaca, N. Y.* 



The species described herein is referable to the iiianca 

 group of Gonomyia Meigen, which, in a more extensive dis- 

 cussion of tlie genus published elsewhere, I have recognized as 

 belonging to the subgenus Leiponcura Skuse. This subgenus 

 is represented in America by the following species : manca 

 O. S. : plcuralis Will. (Atarba) : pticlla Will. (Atarba) ; alexan- 

 deri Johns. {Elliptera), and the present species. 



This form is closest to pleural is, 'f from which it difTers in 

 coloration and, fundamentally, in hypopygial characters. 



Gonomyia (Leipcneura) amazona sp. n. 



Wings with cord margined with brown ; legs black. 

 9 — Length, 5.4-55 mm.; wing, 3.8-3.9 mm. Fore leg, femur. 2.4-2.65 

 mm.; tibia, 4.2 mm. Hind leg, femur. 3-3.2 mm.; tibia. 4-405 mm. 



5 9' — Head. — Rostrum and palpi dark brownish-black; antenna;, 

 basal segments greatly swollen, orange : flagellum with the three or 

 four basal segments almost white, apical flagellar segments dark 

 brownish-black. Front, verte.x and occiput, pale yellowish white. 



Wing of GoTi 



: (Lf{/>. 



Thorax. — Mesonotum, pr:escutum very light yellowish orange ; the 

 lateral margins of the sclcrite broadly whitish, separated from the 

 bright color of the dorsum hy an indistinct lirownish line; scutum 

 brownish-orange, almost concolorous with the prxscutum, scutellum 

 and postnotum very pale, almost white. Pleurx almost white ; a broad 

 band extending across the pleural sclerites, beginning on the genae of 

 of the head, continuing back to the abdomen ; the dorsal and ventral 

 margins of this band are darker, deep brown ; the ventral mark runs 

 through the haltcres, the rest of the band suffusing the luesonotal 

 prsescutum with light brown ; a narrow, more or less dark colored, 



■ Entomological Laboratory, Cornell University. 

 Williston, Trans. Ent. Soc, Lond. (1896) ; p. 289; pi. 10; fig. 61. 



