NEOTROPICAL CADDIS FLIES I — FLINT 465 



Tarsal claws with a single apical hook; ninth tergite with 2 pairs of long 

 setae 2 



2. Anal claw with 2 pairs of well-developed accessory teeth; seta of tarsal claw 



short and very broad (fig. 7,e) Mortoniella Ulmer 



Anal claw with 3 or more pairs of accessory teeth; seta of tarsal claw nor- 

 mal 3 



3. Ninth tergite concave apically; seta of tarsal claw arising from base of cuticu- 



lar outgrowth (fig. 7,0 Mexitrichia Mosely 



Ninth tergite convex apically; seta of tarsal claw arising from posterior face 

 of cuticular outgrowth (fig. 7,j) Protoptila Banks 



Genus Mortoniella Ulmer 



Mortoniella Ulmer, Notes Leyden Mus., vol. 28, pp. 95-97, 1906. 



Ulmer described the genotype, bilineata, from Ecuador in 1906. 

 Subsequently he added a second species, albolineata, from Brazil. 

 The latter, however, was removed from the genus by Mosely in 1939 

 and placed tentatively in Anfoptila. Martynov (1912) described 

 tranquilla from Peru; however, this description, based on a female 

 and unaccompanied by any illustration, is unrecognizable. Such is 

 the present state of our knowledge of the genus. 



In the Cornell University collection is a male specimen from 

 Ecuador that perfectly matches Ulmer's description and figm'es of 

 the genotj^pe and permits the genitalia to be refigured. A second 

 species present in both the adult and the immature material from 

 Ecuador is congeneric on both genitalic and venational characters. 

 Two additional species of Mortoniella are described from pharate 

 adults that agree closely in genitalic structure. Mexitrichia wygod- 

 zinskii Schmid from Argentina apparently also belongs in MortonieUa 

 on genitalic considerations, though Schmid's comments on the venation 

 indicate that Cui in the hindwing is unforked in this species. If 

 Schmid's comments are accm-ate, Mexitrichia Mosely may have to 

 be synonj^mized with Mortoniella, because the genitalic differences 

 alone do not seem to justify a generic separation. Until more 

 species and their venation become known, however, I prefer to regard 

 the two genera as distinct. 



Larvae of the three new species described here are kno\vn to me. 

 They are all similar, in fact, as yet I can find no specific differences, 

 and they are easily separated from the larvae of the other genera. 

 The structure of the tarsal and anal claws is characteristic. The 

 anal claw has only 2 pairs of accessory teeth, and the seta on the 

 tarsal claw has become greatly modified into a short, broad, thumbhke 

 process. It must be admitted, however that Mexitrichia aries, on 

 which the larval differences are based, may not be congeneric with 

 the genotype and when larvae of other species in this genus become 

 known these apparent differences may not prove to be valid. 



