N. Welch et Jk. Gelhaus, A NEW SPECIES OF HELIUS CRANE-FLY (DIPTERA, TIPULIDAE) WITH REDUCED ANTENNAE, FROM ARIPO CAVES, TRINIDAD, Entomological news, 105(3), 1994, pp. 125-132
A new species of crane fly, Helius (Helius) darlingtonae, is described
from Aripo Caves, Trinidad. Both sexes possess a single segmented ant
ennal flagellum, a feature unique within the Tipulidae, and of rare oc
currence within the Diptera in general. Helius darlingtonae n. sp. is
apparently an obligate cave dweller, the first noted in this habitat f
or this genus in the New World and the first species in the genus reco
rded from Trinidad. Based on characteristics of the male genitalia, H.
darlingtonae n. sp. appears most similar to H. distinervis Alexander
from Panama.