June-Sept.. 1919.] ALEXANDER: NEOTROPICAL CRANE-FLIES. 137 



Allotopotype, <j>- 



Paratopotypes, i J\ i J. 



This very interesting species may be confused only with G. lineata 

 End. and G. scolopax Alex. From lineata it differs in its small size, 

 coloration of the thoracic dorsum and pleura, and in the wing-pattern, 

 there being no costal spot basad of the origin of the sector. From 

 scolopax it is readily told by the long rostrum and dark colored 

 wings without a dark spot at midlength of subcosta. 



Genus Rhamphidia Meigen. 

 Rhamphidia albitarsis fuscipes new subspecies. 



Male. — Length, 5—5.7 mm. ; wing, 5—5.8 mm. 



Average size smaller than typical albitarsis O. S. ; thoracic dorsum dark 

 brown, the humeral region a little paler. Pleura pale brown. Tarsi pale 

 brown, only a shade lighter than the remainder of the legs. Wings pale 

 brown, the stigma and costal region a little darker (Plate I, Fig. 4). 



Habitat : Panama, Costa Rica. 



Holotype, <J\ San San, Department of Bocas del Toro, Panama, 

 June 21, 1917 (Axel Olsson). 



Allotype, 5. Zent River, Costa Rica, May 13, 1917 (Axel Olsson). 



Paratopotypes, 8 <§ J ; paratype, % with the allotype. 



The specimen of Rhamphidia albitarsis from British Guiana men- 

 tioned by the writer in an earlier paper (Trans. Am. Ent. Soc, vol. 

 40, p. 230, 1914) probably belongs here. 



Rhamphidia albitarsis fumipennis new subspecies. 



Male. — Length, 6.5 mm. ; wing, 6.5-7 mm. 



Entire body and wings dark brownish black. Rostrum elongated. Legs 

 black with the tarsal tips pure white as in typical albitarsis. The venation is 

 shown on Plate I, Fig. 5. 



Habitat : Panama. 



Holotype, ^, Silico Creek, Department of Bocas del Toro, Oc- 

 tober 4, 1917 (Axel Olsson). 

 Paratopotype, J 1 . 



Genus Gonomyia Meigen. 



Gonomyia (Gonomyella) subcostata new species. 



Antennae with the scape yellow, the flagellum dark brown ; mesonotum 

 brownish-yellow with intense black markings ; pleura white with a broad black 

 dorsal stripe; legs yellowish, the tips of the segments darker; wings pale 

 brownish-gray; Sc very long; r on the long R., +i before midlength; R 2 short, 

 oblique. 



