160 Mr. R M‘Lachlan’s Monograph of the 
in Italy. WR. stigmatica, Kolenati, I am unacquainted with; the 
green pterostigma should make it easily recognizable. 
There is another group of species, none of which have yet been 
found in Britain, of which R. umbrosa, Pict., may be taken as the 
type. These should form a new genus; they differ in being 
smaller and of a different facies, and especially in the structure of 
the larvee, which (according to Pictet) do not possess external 
respiratory filaments. Dr. Hagen proposes to apply Kolenati’s 
name Crunophila to this group, the latter author having dis- 
carded Rhyacophila, in consequence of its having been previously 
used for a genus of birds. 
Dr. Hagen has also remarked (Stett. Zeit. 1859), on the exist- 
ence of two unnamed species, which, in the structure of the per- 
fect insects, seem intermediate between Rhyacophila and Cruno- 
phila; one of these I possess from the Carinthian Alps. 
Genus Grossosoma, Curtis. 
Antenne shorter than the wings; basal joint thick, shorter than 
the head. Head transverse. Ocelli present. Maxillary palpi 
with two short and thick basal joints, the others longer, thin and 
cylindrical. Mesothorax ovate. Anterior wings narrow at the 
base, dilated before the elliptical apex; hairy clothing very slight, 
costal margin nearly straight; at the extreme base of the dorsal 
margin there is a small obtuse lobe; in the male there is at the 
base of these wings a somewhat kidney-shaped, hairy, callous ap- 
pendage, which can be elevated at pleasure; neuration -rather 
strong and distinct ; the radius very slightly bent ; discoidal cell 
large, short, broad and angular, connected with the radius by an 
oblique transverse vein; another transverse vein connects the 
lower margin of the discoidal cell with the upper branch of the 
superior branch of the ramus thyrifer, and another connects the 
two branches of this vein, placed at the point where the superior 
branch fureates. Posterior wings shorter, and more obtuse at the 
apex, than the anterior; discoidal cell closed; two transverse 
veins below it; the anal portion of the extreme base produced 
into a short rounded lobe, furnished with a longitudinal veinlet, 
and fringed with a tuft of hairs. Legs short; the intermediate 
tibize and tarsi strongly dilated in the female; anterior tibize with 
two short apical spurs; intermediate and posterior tibia each with 
two pairs of long and nearly equal spurs. Abdomen thin; on the 
antepenultimate segment there is a horny lobe on the ventral 
surface, and a smaller one on the penultimate ; app. sup. long, 
