238 
Psyche 
[December 
with or without a terminal claw; a partition between prefemur and 
femur is always present; partitions between other articles are either 
present or absent; coxa has a gland opening, which may be on a 
simple, rounded lobe ; prefemur is elongated and more or less vertical ; 
femur is usually swollen. 
Species of the Conotylidae differ from the Trichopetalidae in that 
all have 30 body segments, all have ocelli, they tend to be larger, they 
are often darkly pigmented, segmental setae are sometimes shorter, 
and the coxae of legpair 1 1 of the male lack a gland opening. Anterior 
gonopods are not coalesced, are simpler, do not have the coxa and 
telopodite distinctly divided, and frequently are smaller than the 
coxal endites of the posterior gonopods. Posterior gonopods consist 
of 3 articles, lack a terminal claw, and there are partitions between 
all of the articles. 
Troglobitic species of the Trichopetalidae outnumber the epigean 
species, possibly because of more zealous collecting in caves. Flagel- 
lopetalum is known by one collection of the type species in Illinois. 
Scoterpes , entirely troglobitic, is represented by many species and sub- 
species in Missouri, Kentucky, Tennessee, Georgia and Alabama. 
Trichopetalum, the most widely distributed genus of the family, is 
represented by five species (Chamberlin and Hoffman, 1958) from 
Nova Scotia to Oklahoma. Immature specimens from Louisiana and 
Colorado have been tentatively assigned to this genus. Trigenotyla 
is represented by two species in Arkansas and Oklahoma. Craspedo- 
soma ftavidum Bollman, which I have not seen, may go into this 
genus. Tynopus is known by a single collection of the type species 
from North Carolina; I have not examined it; the number of body 
segments is unknown. Zygonopus , entirely troglobitic, is in Virginia 
and West Virginia; the four species that I formerly assigned to it 
(Causey, i960) are two species, of which one is composed of three 
subspecies. The following key to the genera emphasizes the ocelli 
too much and the gonopod structure too little. 
KEY TO THE GENERA OF THE FAMILY TRICHOPETALIDAE 
BASED MAINLY ON THE MALE 
i. About 8 ocelli are arranged in a bent series; length is about 
4 mm. Tynopus Chamberlin 
Ocelli are either otherwise or are absent; length is up to 15 
mm. 2 
2. 28 body segments; with ocelli 3 
30 body segments; either with or without ocelli 4 
