Noctuidae - Psaphidinae - Grotellini



Grotella parvipuncta Barnes and McDunnough 1912

Grotella parvipuncta Barnes and McDunnough, 1912, Canad. Ent., 44: 19.

Diagnosis: Grotella parvipuncta has a creamy-white forewing and the black dots representing the antemedial and postmedial lines are almost entirely absent except for possibly one or two very small black dots near the inner margin. The hindwing is evenly suffused with dark gray in most specimens and a postmedial line is never present. Wing length: mean = 11.68 mm, standard deviation = 0.38 mm, n = 10.

Distribution: This species is not common in collections but appears to have a wide distribution. It has been collected in most of New Mexico, western Texas in the Guadalupe Mountains, in south-central Colorado, western Arizona in Mohave and Yavapai counties and in San Bernardino county in southern California. The species is not particularly variable. However there is strongly variation in the degree of gray suffusion in the hind wing. In some specimens the suffusion is almost absent, but in others is strong. There is no geographical trend in this variation that I can see.

Adults have been collected throughout the warm months of the year. It has been collected from April to early September. There is some indication of two weak broods, but there is not enough material to verify this hypothesis.

Identification Quality: Excellent

Larva: Unknown

Foodplants: Unknown


Grotella parvipuncta

The characters distinguishing this species from stretchi were discussed under stretchi. In particular in parvipuncta there are no lateral spines on the outer surface of the prothoracic tibia, the valve of the male genitalia lacks a clasper, and the apex of the forewing ventrally does not contrast with a dark gray central region. This species is widely sympatric with Grotella dis and blanca. The forewings of dis and blanca are pure white, but the forewing of parvipuncta has a distinct cream-colored tint to it. The white scales of the front of head are continued laterally between the rim of the frontal process and the eye in parvipuncta, but in dis and blanca the scales in this region are black or dark gray. The hindwing of both dis and blanca have a strong postmedial line (particularly on the ventral surface) but a postmedial line is absent in parvipuncta.

Similar Species

Grotella stretchi

Grotella blanca

Grotella dis