800 [Assembly 
ceding. Body blackish; antennae shorter than the body, robust, thread-like and not 
tapering, black; legs pale. Wings expand 0;38. Taken in Illinois, on bushes betide 
Henderson river, the first of October. 
The Tithan lace-wino ( H. delicatulus ). Two veins arising from tho 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; antennas longer than the body, brpwnish; legs pale. Wings ex¬ 
pand about 0.40. Swept from the grass of prairies in Illinois, the first of October. 
Another insect closely related to the Hemerobiid.®, 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 oaptured I supposed I 
had a species of Jlleurodcs 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 
a’lied 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 
antennae, 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 Neuroptera. 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 perplexed the entomologists of Europe. Whilst Messrs. 
Curtis and Stephens associate this genus with the Psocid®, Mr. 
Westwood regards it as having more affinities with the Hemero- 
biid®. Important differences, however, separate it from both of 
these families. It is unlike the Psocidse in having five-jointed 
feet, and antennae of a different form and with joints doubly 
numerous; and differs from the Hemerobiidse in having wings 
