288 flemiptera-Fleteroptera. 
the head marginated ; anterior femora beneath with a row 
of long hairs; rostrum reaching to the posterior cox. 
L. 5-6 mm. 
On Elins, &e., Woking; Norfolk, Edwards; Pitlochry, 
Forres, Norman. 
QO. prasinus, /'a//—Very like the preceding, but dis- 
tinguishable on close examination by the immarginate or 
almost immarginate vertex, the glabrous front femora 
beneath, the shorter first Joint of the antenna, which is not 
so long as the head, the absence of the longer exserted hairs 
on the second joint, and the shorter rostrum, which reaches 
only to the intermediate coxee ; ¢ forceps of left-hand side 
with its lower margin produced into a long straight process 
at right angles to its stem, right-hand side with two unequal 
processes, the outer or lower one longest. 
L. 5 mm. 
Elms, Norfolk, Edwards; Well Vale, Lincolnshire, J. H. 
Mason. 
O. Scotti, Reut. (viridinervis, D. § S.; prasinus, Saund. 
Synopsis).—So like prasinus as to be scarcely distinguishable 
except by the genital armature of the g. This in Scotti 
differs very much in shape from that species, the right side 
of the forceps having its lower margin very much curved, 
its upper margin emarginate, with a blunt tooth at the side 
of the emargination nearer the base, left side somewhat like 
that of prasinus, but with a much shorter process. The only 
othercharacter of importanceis the slightly shorter apical joint 
of the antennz, which is not longer than the basal joint ; 
this in the ? is the only character I know of to rely upon. 
L. 5 mm. 
On Elms, apparently generally distributed. 
O. ochrotrichus, D. § S. (propinquus, Reut.)\—Very 
closely allied to the two preceding, from which it may be 
known in both sexes by its distinctly and somewhat 
strongly carinated vertex, and in the male by the very 
differently shaped forceps, the right side of which is shaped 
