28 REPORT OF THE COMMISSIONER OF AGRICULTURE. 



among young pine trees. Dr. Packard states that another insect of 

 this genns, JDchhax arvc7isis of Fitch, is an insect of a pale yellow color, 

 with elytra and wings nearly pellucid, and that it is common in wheat- 

 lields early in June, but he does not state what it feeds upon, or whether 

 it injures the wheat. 



Oliarius, n. sp., is a small insect about 0.35 in length, with transpa- 

 No. 7. rent, broad, strongly-veined wings, having a dark spot about 

 vy^^ two-thirds of the way down the outer margin. The body is 

 -^^N dark green, or almost black, with rings of abdomen tinged with 

 UMA reddish. It v.-as taken among high vreeds and brambles, or 

 WMm blackberries, in a meadow near the Maryland Agricultural Col- 

 WW lege, and as its natural history and food are not known, and the 

 insect itself is somewhat rare, it has been figured here, in order to in- 

 duce young naturalists to observe its habits and make them known to 

 the public. 



No. 8.. Ampliiscepa [Flata] hivittaia is a small insect, 0.30 in length, 

 ^ having its upper wings somewhat broad and rounded, like the wing 

 (^M of the common white butterfly. They are somewhat veined, and 

 /'1> rise abruptly from its sides at an acute angle or wedge-form, re- 

 sembling a very steep roof. There is a broad, lateral, dark-reddish or 

 brown stripe running down the middle of its back. Its general color is 

 jTale green, and, when resting on a blade of grass or green leaf, it is 

 scarcely to be distinguished from the substance on which it rests. It is 

 not uncommon in Maryland in grass-meadows, and where brambles are 

 abundant.. 



Onnenis (Poeciloptera) septcntrionalis resembles Ampliisecpa hivittata 



No. 9. very much in both form and color, but is much larger, being 



0.40 in length to end of wing-covers, and is found in the 



same situations, being frequently taken with it in the same 



sweep-net It also frequents the 'May-apple {Podophyllum) and 



grape. 



No. 10. Onnenis {Pocciloptei-a and Flata) pruinosa, the mealy fiata or 

 ^,..ja> frosted tree-hopper, in general form and appearance, resembles 

 ^0f^ the other insects of the genus Jlata before mentioned, being 

 strongly compressed and wedge-shaped. It is about 0.35 iu 

 length to edge of wing-covers. Its height is pretty near double its width. 

 It feeds from July to September on the sap of leaves and succulent 

 shoots of various plants, among which may be enumerated rhubarb, 

 gooseberry, plum, i)rivet, grape, &c. The color of the insect itself is 

 plumbeous or dusky bluish, and when young it is covered with white 

 meal-like powder, giving it a hoary appearance. It is very common in 

 Maryland among grass and rank herbage, but does not appear to do 

 any damage to the plants above mentioned. 



\Ve will now proceed to insects related to the genus 3Iemdracis, some 

 of which present most extraordinary and grotesque forms, and which, 

 when resting on small branches or twigs, resemble thorns or excres- 

 cences so much that they are frequently passed by unnoticed. We will 

 therefore give some figures to. exemplify the singularity of their ap- 

 pearance. 



Enelicnopa {Mcmhracis) hinotata, or the two-spotted leaf-hopper, is ."- 



No^ 11.. most singularly-formed insect, its thorax having a compressed 



horn in front extending above the head ; when perched upon a 



dry stalk it has somewhat the appearance of a miniature bird 



with a long arched neck. It is 0.45 in length to the tip of horn ; 



of a brown or blackish color, and has two pale yellow spots on the edge 



