NEW MUSCOID FLIES FROM THE ANDEAN MONTANYA 13 



vein nearer bend of fourth, subsinuate. Legs elongate, male claws and 

 pulvilli long. 



Type, Neaphria dexina, new species. 



Neaphria dexina, new species. 



Length of body, 9 mm. ; of wing, 8 mm. One male, Chosica, Peru, 

 2,800 feet, October 8, 1913, indoors. 



Head wholly silvery-white ; antennae, arista, and frontalia blackish. 

 Palpi reddish-yellow. Thorax silvery, shading to ashy, two narrow pre- 

 sutural median vittae, two wide broken outer vittae. ScuteUum pale 

 yellowish pollinose, bare of bristlets from insertion of discal bristles to 

 apex. Abdomen and legs yellowish-red, hind edges of second and third 

 segments and tarsi blackish, abdomen silvery pollinose, third and fourth 

 segments above and median line of second cinereous. Wings clear ; 

 tegulae rather colorless, watery, faintly tinged with fuscous. 



This species looks exactly like the common Rhynchodexia sp. of the 

 coast region and foothills of Peru, having same form of body and same 

 elongate legs, with almost the same coloring throughout. It is not until 

 the facial plate is examined that the distinctness of the form is realized, 

 though the bare arista, extremely long proboscis, and absence of discal 

 abdominal bristles will also distinguish it readily. 



Tribe VORIINI 



Xenoplagia, new genus. 



Wing characters and certain other characters of Voria, but not be- 

 longing in that subtribe. Description is from femeJe only. Front and 

 face of femeJe nearly equilateral, only slightly narrower at vertex, equal 

 to one and one-fourth times width of one eye at base of antennae but 

 only about width of one eye at vertex. Eyes almost bare, only very 

 feiintly and sparsely hairy, descending fully as low as vibrissae, latter on 

 oral meirgin which is cut off and only faintly prominent. Cheeks very 

 narrow, not over one-eighth eye-height. Facialia practically bare, only 

 a few weak bristles and hairs next vibrissae. ParafacisJs greatly nar- 

 rowed below, running into the orbit, vsadening graduaJly above, bare save 

 for the single downwardly directed macrochaetae on level with aristaJ 

 insertion and in line with frontal bristles. ParafrontcJs each hardly over 

 one and one-heJf times width of frontaJia, with a few fine hadrs, the two 

 strong rec''- ^' "^ner orbital bristles in line with the more or less decussate 



