Helcystogramma carycastis is a moth in the family Gelechiidae. It was described by Edward Meyrick in 1922. It is found in Guyana and Amazonas, Brazil.[1]
The wingspan is 10–12 mm. The forewings are ferruginous or red brown with a white streak along the fold from the base to near the middle of the wing and with a streak of dark fuscous suffusion along the dorsum throughout. There are two light metallic-grey fasciae edged with blackish, the first from the middle of the costa, at first very broad and extended as a slender whitish streak to the base, rapidly narrowed to the dorsal suffusion at two-thirds, finely white edged anteriorly except towards the costa, and more strongly posteriorly expanding into a triangular white costal spot, the second at four-fifths, narrow, constricted in the middle, irregularly white edged, forming a white spot beneath the costa posteriorly. The costal edge towards the apex is white and there is a light metallic-grey triangular spot on the termen below the middle, and a slight mark at the apex. The hindwings are dark grey.[2]