150 fTemiptera-fTetcroplera. 
sex they bear two spines on their underside, and a row of 
denticulations, 
L. 6-7 mm. 
Common in streams, etc.; developed form rare; it 
appears to be generally distributed, as it is recorded from 
Armagh, Johnson ; Connemara and Aran Island, R. F’. 
Scharf; Forres, Norman ; Shetlands, Reuter. 
MICROVELIA, West. 
Very small, short. Head triangular; face slightly de- 
clivous ; eyes very large, touching the pronotum, and pro- 
jecting beyond its anterior angles; ocelli absent; antenni- 
ferous tubercles on the underside of the head, first jomt of 
the antenne thick, not projecting more than a quarter of 
its leneth beyond the apex of the face, second joint at the 
apex about as thick ‘as the first, third joint thinner, about 
equalling the second in length, fourth joint long, about 
equalling the second and third together, and in the centre 
about as thick as the first; rostrum reaching to the middle 
of the mesosternum; pronotum with its sides short, base 
angularly produced over the elytra in the developed form, 
very slightly and evenly rounded in the undeveloped ; 
elytra in the developed form submembranous throughout, 
rather longer than the abdomen; nerves thick; abdomen 
beneath clothed with silvery hairs; connexivum reflexed ; 
legs, coxee very remote from each other, intermediate 
femora long and narrow, posterior pair incrassated, tarsi of 
front legs two-jointed, of the others three; claws iuserted 
above the apex of the terminal joint. 
M. pygmea, Du/—Black. Head with a silvery line 
along the inner margin of each eye; first joint of the 
antennee pale at the base; pronotum with the posterior 
angles produced considerably beyond the sides of the 
elytra; near the anterior margin are two small transverse 
