Costatrichia bipartita Flint 1970

Costatrichia bipartita

The bifurcate form of the claspers in this species indicates its close relationship to C. panamensis Flint, from which it is easily distinguished by the structure of the eighth sternum, and shape of the lateral penis sheaths, claspers, and aedeagus.

ADULT.—Length of forewing, 2.5 mm. Completely cleared; color unknown. Antenna with scape and basal flagellar segments slightly enlarged, about as broad as long. Forewing with a small reflexed costal cell opening ventrally. Male genitalia: Seventh sternum with a long, narrow process, slightly enlarged apically. Eighth sternum with a small lateral lobe, bearing 1 long, slender seta and 2 short, broad setae; posterior margin with a ragged, U-shaped mesal excision. Ninth segment with anterolateral angle broadly rounded, with a rounded, hirsute posterolateral process. Tenth tergite narrow, pointed ventrally. Lateral penis sheath heavily sclerotized, narrowed and rounded apically, with a ventral subapical point. Clasper with a long curved, dorsal arm, ventral arm curved ventromesally, fused mesally and forming a small lobe in ventral aspect. Aedeagus with typical basal tubular portion, and midlength complex with basal loop; apical portion with a flat dorsal sclerite and a pair of heavily sclerotized spines.

MATERIAL.—Holotype, male. NICARAGUA: CHONTALES: Puente Quinama, near Villa Somoza, 29 July 1967, O. S. Flint, Jr. USNM Type 70899. Paratype: Same data, 1 .