LIMNOPHILIDE&. 
that are triangular in cross-section ; and flat, two-sided cases of leaf 
fragments. 
All members of the family are makers of portable cases, but, 
so far as known, there are no spiral cases, and none made of a 
series of rings placed end to end; there are no cases that are four- 
sided in cross-section, and none that are made entirely of silk. 
In the genus Neophylax the larve make cases of sand with 
large ballast stones at the sides, which are very similar to cases 
made by some of the Sericostomatide, but are more slender, 
smaller, and made of lighter material. A few genera (only Platy- 
phylax as yet described from America) make curved, tapering 
cases of sand grains that quite closely resemble the cases of certain 
Leptoceride. Though there are fairly constant characters for 
determining the cases of the family, it is impossible to give char- 
acters for separating all of the cases generically or specifically. 
Often the cases of different individuals of a single species differ 
more widely from each other than from cases of species of widely 
different genera. 
Limnophilide with gills arising in tufts of two or more. A dark colored longitudinal 
line on frons. 
COLOR PATTERN ON| LATERAL MARGINS OF 
NAME RONS DARK MarK ON FRONS PROTHORAX 
GLYPHOTAELIUS Black longitudinal} Parallel, not widening | Light, except dark brown 
HOSTILIS mark to include lateral sete | on frontand hind margins, 
of front row and median furrow 
Brown Not parallel, widening | Mottled with brown with- 
Torus longitudinal mark,| toward front to include | out distinct light colored 
usually forked at | lateral sete of front band behind median 
anterior end Tow furrow 
HALEsus Black longitudinal) Not parallel, widening | Solid brown-black along 
INDISTINCTUS mark toward front to include | front margin. A broad 
lateral sete of front light band behind trans- 
row verse furrow 
LImNopuHILus Black longitudinal} Not parallel, widening | Solid brown-black along 
INDIVISUS © mark. Sometimes} toward front to include | front margin. A broad 
forked at anterior 
end. 
lateral sete of front 
row 
(Tables continued on page 42.) 
41 
light band behind trans- 
verse furrow 
