152 JMoxious Insects. [Sept., 



strain the fiuid, before pouring it into the kettles for boiling, wher- 

 ever a due regard is had to the purity and cleanliness of the syrup 

 and sugar. 



From the habits of this species, we should infer that it might 

 be abundant in all the snow clad regions of the northern parts of 

 this continent. It may therefoie pro\e to be identical with the 

 Podura hnmicola of Otho Fabricius, (Fauna Groenlandica,) of 

 which we are unable to refer to any but short and unsatisfactory 

 descriptions, which do not coincide well with our insect. Recent 

 specimens exhibit the following characters. 



Podura nivicola. Blue-black; legs beneath, and tail dull 

 brown. Length 0.08. Body cylindric, somewliat broader 

 towards the tail; blaclc, covered with a slightly adherent 

 blue-black powder, and sparingly clothed with minute hairs. 

 Antennce short and thick, longer than the head. Legs above 

 blackish, beneath dull brown, much paler than the body. 

 Tail of the same color with the venter, its fork brownish, 

 glabrous on its inner or tinterior surface, with minute hairs on 

 the opposite side. 



On the Leaves of the Grape Vine, Sucking their Juices. 



A slim cream-colored fly, nearly half an inch Ions., rvith a light vermilion 

 stripe on each side of its head and upper wings. 



Coquebert's Otiocerus. 



This common and pretty species may be met with in July and 

 August, on the leaves of the wild grape vine, and doubtless also 

 on those of the cultivated grape. It likewise occurs on beech, 

 walnut and oak trees; in short any shrub or tree clothed with 

 a very dense growth of foliage, appears to afford it a favorite re- 

 sort. I have met with it more commonly on grape vines which 

 ascend young saplings ten or twelve feet high, and having no 

 support for mounting higher or shooting off laterally, twine 

 around the several limbs of the sapling, completely enveloping 

 and smothering it under a tangled matting of vines and leaves. 

 Hence, keeping the cultivated grape well pruned, so that the air 

 and sunlight will have a free circulation among its leaves, is 

 without doubt one of the best measures for preventing it from 

 becoming infested with these insects. The species is the 



Otiocerus coquehertii of Kirby. It measures 0.35 to the tip of 

 the abdomen, and its wings expand about 0.72. It is of a 

 yellowish-white color throughout, the wings being milk-white 

 and diaphanous; &c.,&c. 



