4i8 



ENTOMOLOGICAL NEWS 



[Nov., '12 



A new Tropical Gonomyia (Tipulidae, Dipt.). 



By CHARLES P. ALEXANDER, Ithaca, N. Y.* 



The species described herein is referable to the manca 

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

 cussion of the 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. ; pleuralis Will. (Atarba) ; puella Will. (Atarba) ; ale.van- 

 deri Johns. (Mllip'tera) , and the present species. 



This form is closest to pleuralis,^ from which it differs in 

 coloration and, fundamentally, in hypopygial characters. 



Gonomyia (Leipcneura) amazona sp. n. 



Wings with cord margined with brown ; legs biack. 

 $ 'Length, 54-5.5 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, 4-4.05 mm. 



$ 9' Head. Rostrum and palpi dark brownish-black; antennae, 

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

 four basal segments almost white, apical flagellar segments dark 

 brownish-black. Front, vertex and occiput, pale yellowish white. 



Wing of Gonomyia (Leiponeura) amazona, n. sp. 



Thorax. Mesonotum, pnescutum very light yellowish orange; the 

 lateral margins of the sclerite broadly whitish, separated from the 

 bright color of the dorsum by an indistinct brownish line; scutum 

 brownish-orange, almost concolorous with the prsescutum, scutellum 

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

 band extending across the pleural sclerites, beginning on the gense 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 halteres, the rest of the band suffusing the mesonotal 

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



* Entomological Laboratory, Cornell University. 



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



