46 COSTA RICAN DIPTERA 



This is not considered a very well defined species. The typical 

 specimens, however, are easily determined by the total absence of 

 poUinose surfaces, except perhaps on the face and pleura. There 

 may be faint dustings of pollen but never so as to obscure the 

 shining surfaces. 



This form is known to range south to Paraguay. Three speci- 

 mens were collected in Costa Rica at the following localities: 

 Muddy bank of Rio Tempisque, Filadelfia, January 18; Santa 

 Cruz, Rio de la Canas, January 30. 



Paralinina ciliata Cresson PI. Ill, fig. 4. 



1916. Paralimna ciliata Cresson, Tr. Am. Ent. Soc, Ixii, 111. 



A species belonging to a group in which the males have the 

 fore femora distinctly ciliate beneath with flattened, curved 

 hairs. The females are difficult to separate from those of meri- 

 dionalis, but the face here is sericeous, light gray or yellowish to 

 nearly white. 



Described from Costa Rica and is represented by twelve speci- 

 mens: Near upper reservoir. Banana River, November 9; Over 

 mud, Cartago, October 27 to January 3; Over mud on southern 

 slope of Irazu, north of Cartago, December 15. 



Paralimxia meridionalis Cresson PI. Ill, fig. 3. 



1916. Paralimna meridionalis Cresson, Tr. Am. Ent. Soc, xlii, 119. 



This species seems to represent appendiculata in the Neotropi- 

 cal Region. It ranges from Guatemala to Argentina, while 

 appendiculata ranges northward. It is possible that appendic- 

 ulata will be found in Costa Rica. The present species is the 

 one likely to be most abundant in the neotropics and is distin- 

 guished by the general dark color; the face is dull gray, not 

 sericeous, with the usual three dark dashes of brown or yellow. 

 The legs are not furnished with any peculiar bristles, but the fore 

 femora are ciliate with closely set bristles. 



Originally described from Costa Rica and represented by 

 thirty specimens: Alajuela, September 15; Upper Reservoir, 

 Banana River, November 9; Stagnant pool on bank of Rio Reven- 

 tazon, Cachi, March 10; Cartago, July 4 to December 12; Irazii 

 Volcano, December 15; La Carpentera, December 4; Bonnefil 

 Farm, Rio Surubres, October 21; Turrucares, December 21. 



