E. T. CRESSON, JR. 47 



Paralimna brunneiceps Cresson 



191G. Paralimna hruuneiceps Crosson, Tr. Am. Ent. Soc, xlii, 120. 



A species in general similar to meridionalis, but the face, with 

 the exception of the orbits and foveae, is evenly dark brown. It 

 may prove to be onh^ a variety of that species. 



Originally described from Costa Rica and represented by ten 

 specimens: Alajuela, Septembers to 15; Rio Siquiares, December 

 19; Tiirrucares, December 22; Bonnefil Farm, Rio Siiriibres, 

 October 21. 



Paralimna argyrostoma Cresson 



1916. Paralimna argyrostoma Cresson, Tr. Am. Ent. Soc, xlii, 120. 



This well marked species, known only from Costa Rica, has 

 the face silvery white and the general body color olivaceous, not 

 brown, and a silvery spot on the upper apical angle of the second 

 antennal joint. This should not be confused with the next species. 



Eight specimens collected : Near upper reservoir. Banana River, 

 November 9; Rio Aranjuez, Puntarenas, September 15, 1905, 

 (F. Knab), [U. S. N. M.]. 



Paralimna puncticornis Cresson 



1916. Paralimna puncticornis Cresson, Tr. Am. Ent. Soc, xlii, 121. 



This species also has the silvery spot on the second antennal 

 joint, but is darker than the preceding, more brownish, not green- 

 ish, and the face is dark, hardly grayish. It has the frons rather 

 horizontal, but the eyes are round and large. 



It is known to range south to Colombia. Onl}' one specimen 

 seen from Costa Rica: Peralta, March 24. 



HYDRELLIA 



1830. Desvoidy, Myod., 730. 



A genus closely resembling Notiphila in general characters, but 

 the species are much smaller, with pilose eyes; the costa extends 

 to fourth vein, and the middle tibiae are not possessed of the 

 characteristic extensor bristles. 



The species known from Costa Rica may be separated as fol- 

 lows: 



Palpi l)l:u;"k. 



Only one dorso-central, excluding prescutellar pair; frontal stripes velvety 



black; face densely silvery-white tibialis 



Two such bristles; face dull ochreous to black calverti 



TRANS. AM. ENT. SOC, XLIV. 



