286 Hemiptera-Heteroptera. 
(25) 26. Third and fourth joints of the antenne 
together longer than the second. 
(30) 27. Rostrum not reaching to the posterior 
cox, posterior femora _ scarcely 
thickened. 
(29) 28. Rostrum thicker, reaching slightly beyond 
the anterior coxz, colour darker green, 
membrane dark. - CHLOROPTERUS. 
(28) 29. Rostrum thinner, reaching to the inter- 
mediate cox, colour px aler green, mem- 
brane paler . . CONCOLOR. 
(27) 30. Rostrum reaching beyond the posterior 
cox@, posterior femora more or less 
thickened. 
(82) 31. Oblong oval, vertex not carinated, cell 
nerves yellow - : . ERICETORUM. 
(81) 82. Short oval, green or red, vertex strongly 
carinated, cell-nerves ‘hot yellow . . RUBIDUS. 
O. fuscescens, K).—Oblong or oval, broad, olive 
brown, clothed with fine pale and brown hairs. Antenne 
with the first joint shorter than the fourth, third about 
two-thirds the length of the second, which is about eqnal 
to the third and fourth together; pronotum transverse, 
callosities well defined; elytra subparallel-sided in the 2, 
sides curved in the ¢, membrane dusky ; tibiz with fine 
spines. 
L. 4-45 mm. 
On firs, July, Forres, Norman. 
O. bilineatus, Fa//—Subelongate, greyish or greenish 
brown ; clothed with short pale hairs. Head yellowish, dorsal 
line, widening anteriorly, brown; antennz black, second 
joint subequal to the third and fourth together, fourth not 
half so long as the third; pronotum with the sides sinuate, 
posterior angles slightly raised, generally with a dark band 
across the callosities, and the hind angles brown; scutellum 
yellow, triangularly brown in the centre ; elytra subparallel- 
sided; clavus brown, except on its outer margin, corium 
greenish, more or less clouded towards the apex ; membrane 
slightly dusky ; tibiz with fine spines, tarsi black. 
L. 5 mm, 
On aspens, Wimbledon; Wymondley and Stevenage, 
