no. 3608 CADDIS FLIES, IV — FLINT 11 



forewings green except for apex. Male genitalia : Seventh sternum 

 with a long spatulate process. Eighth sternum produced laterally, 

 broadly U-shaped ventrally. Ninth segment with a rectangular 

 dorsomesal emargination, posterior margin bordered with a row of 

 long setae. Clasper long and slender, with a dorsal tooth at mid- 

 length. Aedeagus membranous at apex, with a pair of dark lateral 

 plates and a ventral scoop; a complex of processes at midlength that 

 bears a pair of basally projecting rods; a simple tubular basal portion. 



Holotype, male: Guatemala (Izabal), Las Escobas near Matias de 

 Galvez, Aug. 14-16, 1965, Flint and Ortiz. 



Paratypes: Same data, 47 d\ 4 9. 



Zumatrichia echinata, new species 



Figures 40-42 



This species is closely related to Z. galtena Mosely, from which it 

 differs in lacking digitate lobes apically on the long lateral processes 

 of the claspers and in having a mesoventral spine on the aedeagus. 



Adult. Length of forewing 3-3.5 mm. Body and legs brown; 

 antennae darker, with a series of paler segments subapically; head, 

 thorax, and forewings with intermingled patches of greyish-green 

 and black hairs. Male genitalia: Seventh sternum with a pointed 

 mesal process. Eighth sternum with ventral margin almost squarely 

 truncate, with a narrow mesal excision. Ninth segment bearing 

 a row of stout setae dorsally, a process laterally (probably bearing 

 a long seta apically) ; dorsomesally with a large membranous region 

 with a dorsally projecting lobe, lateral margins heavily sclerotized 

 and bearing posteriorly a forked process that articulates with the 

 lateral sheath of the aedeagus. Clasper digitate in lateral aspect, 

 bearing dorsally a long, heavily sclerotized, sinuous process. Aedeagus 

 with a pair of ovoid lateral sheaths that bear a midventral tooth. 

 Aedeagus proper with a pair of apical spines, a dorsomesal tongue- 

 like strap, lateral sheaths, paired dorsomesal knobs bearing processes, 

 and a complete basal loop. 



Holotype, male: Guatemala (El Progreso), San Agustin Acasa- 

 guastlan, Aug. 11-21, 1965, Flint and Ortiz. 



Paratype: Same data, 1 9. 



Costatrichia panamensis, new species 



Figures 43-45 

 This species is closely related to the genotype with which it agrees 

 in the generic characters: reflexed costal cell, enlarged antennal 

 segments, spine of the seventh sternum, and general plan of the 



