or 
206 Mr. F. W. Edwards on British Limnobiidae. 
Alexander. Two of these are therefore described below 
as new, though it is certain that the first at least occurs on 
the Continent (compare Riedel’s remarks, Entom. Runds- 
chau, xxxvi). All three are alike in venation. The pupae 
show slight specific differences. 
H. pallirostris sp. n. (Pl. I. fig. 5.) 
Mesonotum with three distinct dull black stripes on a light brown 
ground-colour. Head greyish-ochreous with a longitudinal black 
mark; proboscis light brown beneath, darker above. Antennae 
all black; basal flagellar joints about twice as long as broad; verticils 
long, as in the other two species. Stigma roundish, nearly black 
and very distinct. Legs rather dark brown, tips of femora nearly 
black. Hypopygium ; ninth tergite with two little rounded hairy 
projections in the middle. Ninth sternite swollen and somewhat 
produced in the middle, bare at the sides. Side pieces with a large 
dorsal, basal membranous projection, serrate on its posterior edge. 
Upper (or inner) clasper bent before 4, its terminal 3 quite smooth. 
Lower clasper very short, ending in a single curved spine. 
I have taken this species at Letchworth, Herts., and 
Slapton, 8. Devon; in the former case it was reared from 
larvae found in rotting leaves of Typha. It can hardly be 
H. longirostris, which is described as having a blackish- 
brown proboscis; nor H. inornata, which is said to have 
reddish legs with a dark ring before the tips of the femora. 
H. dubius sp. n. (PI. I. fig. 3.) 
Thorax, rather dark brown, pleurae more greyish, sometimes with 
an ochreous tinge; mesonotum slightly shining, with three broad 
but ill-defined darker brown stripes. Head dark grey, unmarked ; 
proboscis black. Stigma rather elongate, light brown. Antennae 
all black, distinctly shorter than in H. pallirostris, the basal joints 
of the flagellum very little longer than broad. Legs dark brown, 
femora lighter at the base. Hypopygiwm: very similar to that 
figured by de Meijere for H. longirostris, but the claspers of a rather 
different shape; the upper (inner) pair have a much more pronounced 
hump at the bend, and the lower (outer) pair are bare and have 
the pale basal part very much broader, especially just before the 
middle. (In fig. 3 they are somewhat fore-shortened and do not 
show the full breadth.) 
The British Museum series comprises specimens from 
Lymington and Tunbridge Wells (Verralll) and Radwell, 
Herts., and Corriegills, Arran (fF. W. £.); Mr. Cheetham 
