96 APPLK LEAVES — MEALY- WINGED FLY. 



ceding. Body blackish ; antennae shorter than the body, robust, thread-lilie and not 

 tapering, black; legs pale. Wings expand 0.38. Taken in Illinois, on bushes betide 

 Henderson river, the first of October. 



The TiTMAN LAOE-wiNG (H. delicatulus) . Two veins arising from the inner rib- 

 vein, the first more towards its base, the second more towards its tip than in the pre- 

 ceding species ; wings hyaline with dusky dots on the veins and a single row of veinlets 

 running obliquely across the disk from the rib- vein to the first longitudinal and broad- 

 ly margined with dusky; veins pale brown, those of the costal area blaekish, the 

 alternate ones towards the base forked, all the others simple; margin thinly fringed 

 with short hairs, a dot on the tips of the veins and a smaller one between them. Body 

 dusky yellowish-; antennae longer than the body, brownish; legs pale. Wings ex- 

 pind about 0.40. Swept fi-om the grass of prairies in Illinois, the first of October. 



Another insect closely related to the HEMEROBiiDa:, and the 

 larva of which is supposed to feed upon plant-lice, may be noticed 

 in this connexion. It is of minute size, and by no means rare, 

 occurring upon apple and other trees, and also upon the wing at 

 twilight or in shady situations, from early in June until the end 

 of July. It is so anomalous that, at one time and another, I have 

 been occupied several days in investigating it and determining 

 where it should be arranged. When first captured I supposed I 

 had a species of Aleurodes in hand, its minute size, its mealy- 

 white coating, and the size of its wings giving it a close resem- 

 blance to the insects of that group. Indeed the European species 

 allied to this were at first placed by Mr. Stephens in that family. 

 But the number of veins in the wings and of joints in the feet and 

 antennse, and above all the structure of the mouth with jaws for 

 masticating food and not a beak for suction, absolutely excludes 

 these insects from such an association, and also from being arranged 

 with the moths, where the old authors placed them. It is ob- 

 vious that our insect pertains to the order Neuropteua. And in 

 this order its. many points of resemblance to the Coniopteryx 

 Tineiformis, Curtis, leaves no doubt that it finds its true relatives 

 with that insect and its associates, the classification of which has 

 so much perpleSed the entomologists of Europe' Whilst Messrs. 

 Curtis and Stephens associate this genus with the Psocid^., Mr. 

 West wood regards it as having more affinities with the Hemeho- 

 BiiDiE. Important differences, however, separate it from both of 

 these families. It is unlike the Psocidse in having five-jointed 

 feet, and antennse of a dilferent form and with joints doubly 

 numerous; and differs from the Hemerobiidse in having wings 



