no. 3608 CADDIS FLIES, IV — FLINT 13 



and bearing a few dark spines. Clasper elongate, with apicoventral 

 angle developed into a process whose tip is upturned. Dorsally 

 an internal U-shaped plate that bears a long narrow process ventrally 

 passing around aedeagus; mid ventrally with a sinuate indistinct 

 sclerotization. Aedeagus long, apex upturned slightly, with a long 

 tightly appressed process wrapped around stem and another pointed 

 process near end. 



Holotype, male: Mexico (Vera Cruz), Rio Tacolapan, route 180, 

 km 551, July 25-26, 1966, Flint and Ortiz. 



Paratypes: Same data, 2 9. Mexico (Vera Cruz), Cuitlahuac, Aug. 

 10-12, 1964, Spangler, 1 c? . Guatemala (Suchitepequez) , Finca Moc&, 

 June 12, 1966, Flint and Ortiz, 3 cf, 1 9. 



Neotrichia costaricensis, new species 



Figures 52-54 



Perhaps most closely related to N. edalis Ross, this species seems 

 rather isolated within the genus. The dorsoapical processes of the 

 aedeagus and the hoodlike shape of the tenth tergum are unique. 



Adult. Length of forewing 2 mm. Specimens in alcohol uniformly 

 brown. Male genitalia: Eighth segment incomplete ventrally, with 

 anterolateral processes. Ninth segment with anterolateral processes. 

 Tenth tergum hoodlike. Bracteole very indistinct, appearing elon- 

 gate and enlarged apically in ventral view. Claspers small, black, 

 trianguloid in ventral view. Subgenital plate black, small, and chev- 

 ron shaped in ventral aspect. Aedeagus slightly moniliform, with a 

 sclerotized apicoventral strap; apex with two pairs of dorsally directed 

 processes, basal process longest with basal teeth, apical process 

 shorter. 



Holotype, male: Costa Rica, La Lola near Matina, Mar. 11, 1965, 

 Duckworth. 



Paratypes: Same data, Id 1 ; same except May 1, 1957, R. D. 

 Shenef elt, 1 cf . 



Hydroptila veracruzensis, new species 



Figures 55-57 



This species seems to be related to H. berneri Ross, from which it 

 is distinguished by the lateral processes of the ninth segment and the 

 well-developed spiral process of the aedeagus. 



Adult. Length of forewing 2 mm. Color in alcohol uniformly 

 brown. Male genitalia: Seventh sternum with a pointed process 

 mesally. Ninth segment with a pointed apicolateral process. Tenth 

 tergite well sclerotized laterally, membranous mesally. Clasper elon- 

 gate, rounded apically in lateral aspect with a single dark point, in 



