470 PROCEEDINGS OF THE NATIONAL MUSEUM vol. im 



Mortoniella hodgesi, new species 



Figure h,f,g 



As with angulaia, this species is also represented only by pharate 

 adults. The genitalia show considerable similarity to those of 

 angulata, but the tenth terguin is very different and the dorsal process 

 of the aedeagus is only slightly upturned before the apex. 



Adult. — ^Length of body 4 mm. Male genitaha (fig. 5,/): Ninth 

 segment quadrate and oblique in lateral view; tenth tergum with 

 lateral lobes narrow, surpassed by decm-ved apex of dorsal lobe which 

 is divided by a U-shaped incision (fig. 5,g); dorsal process of aedeagus 

 with apex slightly upturned and terete; lateral process of aedeagus rod- 

 like, extending for little more than half length of dorsal process; 

 ventrad to aedeagus a pair of short basal rods, and two processes 

 near midlength, ventral one scoop-shaped and undivided, inner one 

 slender and pau-ed; ventral sm-face of aedeagus only lightly sclerotized. 



Holotype cf , allotype 9, paratypes 2 c?^, 2 9, all pharate adults: 

 Ecuador: stream 5 miles south of Antisana, 13,500 ft., Apr. 28, 1958, 

 R. W. Hodges (USNM Type 66020). 



Larva. — No differences from apiculata found. 



Pupa. — No differences from apiculata found. 



Case. — The anterior and posterior openings are not as firmly 

 rimmed with silk as in apiculata. 



Material. — Larvae and pupae from type locality. 



Genus Mexitrichia Mosely 



Mexilrichia Mosely, Trans. Ent. Soc. London, vol. 86, p. 158, 1937. 



There appear to be two very distinct groups of species in Mexi- 

 trichia. The typical group is characterized by the presence of three 

 branches of M in the hindwing; the second group differs in possessing 

 only two branches of M. To the former belong M. leroda Mosely, 

 M. meralda Mosely, M. rancura Mosely, M. bolivica Schmid, M. 

 wygodzinskii Schmid, and M. elongata, new species. To the latter 

 belong M. ormina Mosely, M. teutonia Mosely, M. unota Mosely, 

 M. aries, new species, M. atenuata, new species, and M. aequalis, new 

 species. 



Mexitrichia aries, new species 



Figures 7,f-i; 8,c 



This species apparently is related to atenuata and aequalis, but may 

 be distinguished by the unique spiral process on the aedeagus. 



Adult. — Length of forewing 3 mm. Brown, membrane at 

 anastomosis pale. Venation apparently the same as that of atenuata. 

 Sixth sternum with a long pointed apicomesal process. Male genitalia 



