270 Professor Williston on the 



Front yellow or yellowish-red ; in width a little less than one- 

 third of the head ; facets of the eyes uniform in size. Antennae 

 brown or blackish, finely pubescent, composed of thirteen joints, 

 of which the first two are swollen, and the third somewhat dilated. 

 Palpi small, for the most part concealed. Proboscis nearly four 

 times as long as the vertical diameter of the head. Eyes pube- 

 scent. Thorax yellow or yellowish-red, the mesonotum a little 

 darker in front, the pleurae with patches of silvery lustre. 

 Abdomen dark brown, the basal segments more or less yellowish. 

 Legs yellow, the femora with blackish bands on the distal half, 

 the tarsi blackish towards the tip ; hind tibiae with spurs. Wings 

 pure hyaline. 



Four specimeus. The present species, though seem- 

 ing to agree closely in its structural characters with 

 P. sujperhiens, Schiner, differs, aside from the markedly 

 smaller size, in the absence of black spots on the 

 mesonotum. It is not at all improbable that our 

 specimens are conspecific with those mentioned by 

 Osten Sacken (Cat. Dipt.^ 197d, 17^218) as occurring in 

 Mexico. 



Sackeniella, n. n. — Since the appearance of my paper 

 (Kansas Univ. Quart., i., p. 119) in which I described a 

 new genus of this family, I have discovered that the 

 name 8nowia, there used, has been previously employed 

 for a genus of Lepidoptera. I hero therefore substitute 

 Sackeniella in honour of Dr. C. R. Osten Sack en. 



CULICID^. 



Megarehina. 



Bob. Desvoidy, Essai, etc., in Mem. de la 'Soc. d^Hist. 

 nat. de Paris, iii., 412, 1827. 



1. Megarrhina jportoricensis. (PI. VilL, fig. 28^ head 



of $ ', 2Saj wing.) 



Megarrhina jportoricensis, Roeder, Stott. Ent. Zeifc., 

 1885, p. 837.— Porto Rico. 



Two specimens, male and female. Sea level. 



