Vorhies—Studies on the Trichoptera of Wisconsin. , 689 
strongly upward, and curve backward between the levels of the 
penis cover and the superior appendages; the ventral portion is 
dark brown and at the junction of this with the lighter portion 
above there is a small lobe on the posterior edge. 
In every particular, except the genitalia of the male, my 
specimens agree with the descriptions of Hagen and Ulmer, and, 
unless this be a new species, the difference here shown between 
my specimens and the type, as seen in my figures and Ulmer’s 
must be due to the drawings being made, in the one case, from 
material preserved in alcohol and in the other from a dried and 
old specimen. 
Considerable variation in general coloration from luteo- 
fuscous to nearly black, and from bright green to fuscous in 
the abdomen, appears to be correlated with the age of the insect, 
the lighter colors belonging to those most recently transformed. 
Variation in the conspicuousness of the anal spot is also notice¬ 
able. This species is common in the latter part of June. 
Larva. —Length, 6-7 mm. Width, 1.5 mm. Head small as 
compared with the width of the abdomen. Body in life light 
green. Head and thorax yellow. Antennae large, yellow;, 
mandibles brown. Light brown spots on head as follows: on 
upper portion of clypeus a transverse spot lying in the base line 
of an arch formed above it by four other spots, their ends more 
or less closely approximated; ( on either side of the clypeus ex¬ 
tends a row of four or five rounded spots lying in the direction 
of a line extending from either side of the posterior median 
suture toward the antennae. Pronotum plain, except posterior 
half of lateral border, and posterior edge near median line, 
black. Fringe of hairs on anterior portion of pronotum. Mesa- 
notum slightly chitinized in central portion, but almost color¬ 
less; a pair of crescentic black bars, with concavities outward, 
on posteror half of segment; a group of dark hairs on anterior 
lateral corner. Metanotum without chitin except black bars on 
anterior lateral portion for the attachment of legs. Legs yel¬ 
low. Lateral line absent. Gills simple, Fig. 10. Lateral 
tubercles with a black bar of chitin and a group of spines which 
are arranged in pairs, all pointing forward. Dragging hooks 
small, with an acute curve. 
