136 Journal New York Entomological Society. [Vol. xxvu. 



Habitat : Argentina. 



Holotype, J 1 , El Suncho, Catamarca, altitude 2500 meters, April 

 28, 1 91 5 (P. Jorgensen). 



In my key to the species of Peripheroptera (Ent. News, vol. 24, p. 

 409, 1913) this species runs to P. schincri O. S. of Brazil which 

 differs in having a shiny yellowish-red thorax with an anterior black 

 stripe, the legs yellow with the tips of the femora darker and the 

 wings faintly yellowish. 



Genus Geranomyia Curtis. 



Geranomyia nigripleura new species. 



Size small ; rostrum moderately elongate, exceeding the combined head 

 and thorax; mesonotum reddish-brown, the praescutum with indistinct stripes; 

 thoracic pleura yellow with a broad dark brownish-black stripe that covers the 

 dorsal sclerites ; legs uniformly pale brown, the tarsi more yellowish; wings 

 strongly infumed, the cord narrowly seamed with dark brown ; abdominal 

 tergites dark brown, the sternites bicolorous, brown and dull yellow. 



Male. — Length, excluding the rostrum, 5.1 mm.; wing, 5.3 mm.; rostrum, 

 2. 3— 2.4 mm. 



Female. — Length, excluding the rostrum, 4.8 mm.; wing, 5.1 mm.; ros- 

 trum, 2.6 mm. 



Rostrum dark brown, a little paler distally, moderately elongated, longer 

 than the head and thorax taken together. Antennae black. Head dark gray. 



Mesonotal praescutum rich reddish-brown with three narrow and indis- 

 tinct darker stripes ; lateral margins of the sclerite broadly yellowish ; scutum 

 yellow with the lobes reddish-brown. Pleura yellow, the dorsal pleurites dark 

 brownish-black producing a broad stripe that extends from the cervical scle- 

 rites to the base of the abdomen and includes the halteres. Halteres dark. 

 Legs with the coxae and trochanters pale yellow ; femora uniformly brown 

 excepting the bases which are paler ; tibiae brown ; tarsi pale yellowish-brown. 

 Wings with a strong brownish tinge, deepest at the apex ; stigma rounded oval, 

 dark brown ; indistinct dark brown seams at the tip of Sc and the base of 

 the sector ; less distinct seams along the cord and outer end of cell 1st M„. 

 Venation (Plate I, fig. 1) : Sc short, extending from just beyond the origin of 

 the sector to opposite one-third its length; Sc 2 at the tip of Sc 1 ; Rs about as 

 long as cell 1st M 2 ; basal deflection of Cu x at or just beyond the fork of M. 



Abdominal tergites dark brown ; sternites dull yellow on the apical half, 

 brown on the basal half; ventral pleural appendages of the male hypopygium 

 large, fleshy, brown. Valves of the ovipositor short, acute, the tergal valves 

 slightly exceeding the sternal valves. 



Habitat : Panama. 



Holotype, J 1 , San San, Department of Bocas del Toro, June 21 , 

 1917 (Axel Olsson). 



