Grumichella aequiunguis Flint 1983

Grumichella aequiunguis

The species is a close relative of G. flaveola (Ulmer). It differs in lacking the dark spots at the apex and on the crossveins of the forewing and in the male genitalia. The tenth tergum is not so wide basolaterally, and the apex is developed into three lobes, and the apical segment of the clasper is broader, especially apicad, and is as long as the dorsal process.

ADULT.—Length of forewing, 8 mm. Color yellowish; forewing with 2 small spots of fuscous hair, 1 at midlength, other at apex of anal area.

Male Genitalia: Ninth segment annular, slightly expanded dorsolaterally. Tenth tergum elongate, apex in dorsal aspect trilobate; in lateral aspect not greatly widened basally and with apicolateral area distinctly darkened. Cercus ovoid, less than half as long as tenth tergum. Clasper with a distinct basomesal shelf, apicodorsal section membranous, terete; apical segment as long as apicodorsal section, not tapered apicad, concave mesally. Aedeagus cylindrical, slightly angled, with a small internal sclerite.

MATERIAL.—Holotype (male): ARGENTINA, PCIA. MISIONES, Arroyo Piray Mini, Rt. 17 W Dos Hermanas, 23 Nov 1973, O.S. Flint, Jr., USNM Type 100540.

Paratypes: Same data as holotype, 5, 1; Arroyo Piray Guazú, N San Pedro, 22 Nov 1973, O.S. Flint, Jr., 2.

The genus is known only from South America and the Lesser Antilles. It is divided into two groups of species, one limited to the Chilean Subregion, the other to the Brazilian Subregion of South America and the Lesser Antilles. It is of obscure affinities and placed in the Leptocerinae but not assigned to any tribe (Morse, 1981),

The larva of the Antillean species is described (Flint, 1968b), but none of the Chilean group are described. The larvae have been taken in flowing water, often small springs and spring runs. The food is unknown.