44 COSTA RICAN DIPTERA 



Notiphila virgata Coquillett 



1900. Notiphila virgata Coquillett, Proc. U. S. Nat. Mus., xxii, 259. 



This species, in the male, has the middle tibiae distinctly ciliate 

 with comb-like series of short bristles. The antennae are mostly 

 pale, the mesonotum distinctly vittate, and the abdomen with 

 four series of brown spots. It is very distinct from erythrocera, 

 and in general easy to distinguish, although the vittate individ- 

 uals of that species are often confusing. The females may, on 

 the other hand, be confused with the recessive forms of facialis. 



Originally described from Porto Rico. Twenty-five specimens 

 were collected, mostly over mud, from the following localities 

 Alajuela, September 8; Cachi, near Rio Reventazon, March 4 

 Cartago, February 19 to May 17; Juan Viiias, February 14 

 Peralta, March 24. 



Xotiphila frontalis Coquillett 



1904. Notiphila frontalis Coquillett, Proc. Ent. Soc. Wash., vi, 97. 



In this species the frons especially, and the mesonotum, are 

 distinctly vittate. The frontal stripes are velvety black, the 

 orbits and face being golden yellow. The broad abdominal 

 bands attain the apices of the segments medianly. This is a 

 pretty and well marked species, probably a neotropical repre- 

 sentative of the northern pnlchrifrons Loew. 



Originally described from Nicaragua, and represented in our 

 material by eleven specimens: Banana River, November 9; 

 Cartago, February 19 to May 17; Turrucares, December 22. 



PARALIMNA 



1862. Loew, Mon. Dipt. N. Am., i, 138. 



This genus is well represented in Costa Rica. The species, 

 however, are difficult to determine, and my recent revision of this 

 genus should be consulted by the student who desires to become 

 more acquainted with the species. In this paper I will give only 

 a table of the species known to occur in Costa Rica, with a list 

 of the material examined and some pertinent notes. The genus 

 is characterized by the presence of three extensor bristles on the 

 middle tibiae and the continuation of the costa to the fourth vein. 



