Ochrotrichia quasi, new species

Figs. 5 a, b, c

Based on the finger-like dorsal lobe of the inferior appendages, this is another species of the arranca group closely related to Ochrotrichia arranca (Mosely) and O. conformalis new species . However, the distribution of spines on the inferior appendage and small size of its ventral lobe, clearly separate O. quasi new species from O. arranca (Mosely) and O. conformalis new species .

Male: Length of forewing 2.0 mm. Color in alcohol stramineous. Segment IX depressed, slightly produced anteriad, with posterodorsal margin slightly produced. Segment X in dorsal view, with long, slightly curved, dorsal process, bearing 2 large black setae; in lateral view, left side with apically bifurcated process with acute apex. Inferior appendage with elongate, finger-like, dorsal lobe; on right side with strong spine-like process on base of dorsal lobe; left inferior appendage with elongate ventral lobe; between lobes dark apical spines-like of 2 different sizes; in ventral view, ventral lobe with pair of short, stout, preapical spine-like processes. Phallus long, thread-like.

Female: Unknown

Type material: Holotype, male. COSTA RICA: San José: Río Savegra, San Gerardo de Dota 9.33º N, 83.48º W, el. 2200 m, 9.viii.1995, C. Young (CMC). Paratypes: Same data as the holotype but 9.viii.1995, 1 male (NMNH), 4.iii.1995, 1male (UMSP).

Etymology: Quasi is the Latin word meaning “appearing as if;” referring to the similarity of this species with O. conformalis new species and O. arranca (Mosely) .