Vol. XXvii] ENTOMOLOGICAL NEWS. 147 



Descriptions of new Genera and Species of the 

 Dipterous Family Ephydridae III. 



By E. T. CRESSON, JR., Academy of Natural Sciences of 



Philadelphia. 



TYPOPSILOPA n. gen. 



Allied to P silo pa from which it may be distinguished by the 

 two well developed dorso-central bristles, arranged i + i. 

 The face is distinctly foveolate, with foveae well removed 

 from the orbits ; two distinct facial bristles each side, although 

 the upper is much stronger. Psllopa, typically, based on its 

 genotype, Notiphila nitidula Fall., has no dorso-central bristles 

 and the facial foveae if noticeable are very near the orbits, and 

 the face has only one side bristle, very low. The present 

 genus is apparently allied to Clasiopclla Hendel, differing in 

 the presence of two dorso-centrals. Whether the presence or 

 absence of these bristles is of generic importance may be ques- 

 tioned. 



Genotype Typopsilopa flavitarsis Cress. 



Psilopa atra Lw. also belongs here. 



Typopsilopa flavitarsis n. sp. 



Black ; knob of halteres white, all tarsi yellow or tawny, apices 

 brownish. 



Similar to Psilopa atra Lw. Frons with the proclinate orbitals 

 slightly below the reclinate frontals. Face about twice as long as broad 

 and nearly as broad as vertex, with the upper bristles about at middle, 

 in profile. Antennal spine as long as third joint. Length 3.0 mm. 



Type $, Bill Williams Fork, Arizona, August, (F. H. 

 Snow), [University of Kansas Collection]. 



Paratypes 3 $ , topotypical. 



In comparison with atra this species differs principally in 

 the longer face, higher placed facial bristles and the contrast- 

 ing yellow tarsi. The frons seems less shining, so that the 

 opake frontalia are less differentiated ; the face also is less 

 shining and more or less irregularly wrinkled. 



Ilythea flaviceps n. sp. 



Similar to spilota but larger. 



Yellow ; frons and thorax brown or darker ; abdomen and all bristles 



