NO. 3665 CADDISFLIES—FLINT 25 
have been found on the Antilles. Leptonema and Smicridea, respec- 
tively, are the representatives throughout the Antilles, but Macronema 
and Hydropsyche are found only on the Greater Antilles. 
The larvae construct a complex silken trap-net to strain their food 
from the water. The trap-net is attached to a tubular retreat in some 
crevice of the substrate. At pupation time a domelike shelter is 
constructed of silk with included sand or organic matter. 
Key to Genera 
LARVAE 
Gills consisting of a long central stalk giving rise to many lateral filaments. 
Leptonema 
Gills branching into filaments near base. ......... .. . .Smicridea 
PUPAE 
Hook-plate present posteriorly on segment 3 only. .... . . . .Leptonema 
Hook-plates present posteriorly on segments 3 and 4... . . . .Smicridea 
ADULTS 
Antennae at least twice as long as wing; large and pale green. . . . Leptonema 
Antennae subequal to forewings; small and dark. .... . . . .Smicridea 
Genus Smicridea McLachlan 
Smicridea McLachlan, 1871, p. 134. [Type-species: Smicridea fasciatella 
McLachlan, 1871, by designation of Milne, 1936.] 
Smicridea is a genus of many species found from the southwestern 
United States to the southern tip of South America and Australia. 
All of the Antillean islands support at least one species. The larvae 
and pupae have been described on several occasions (Ross 1944, 
Flint 1964b). 
Key to Species 
PUPAE 
Hook-plate 3P equidimensional with 3 long hooks. ..... . .S. cariba 
Hook-plate 3P nearly twice as wide as long, with 5 hooks. . . . .S. simmonsi 
ADULTS 
1. Forewing black with 2 transverse bands of white setae. ........2 
Forewing uniformly grayish. ... . ste : . S. grenadensis 
2. Tenth tergite short and broad, aedeagus boat tera plate. .S. simmonsi 
Tength tergite long and narrow, aedeagus with lateral plate. . .S. cariba 
Smicridea cariba, new species 
Friaures 50-56 
This species, found on Dominica, is most closely related to the 
following species from St. Lucia. It differs strikingly in the structure 
of the tenth tergite and aedeagus. 
