548 AUTHENTIC HISTORY 



Although the foregoing list contains the species usually referred, by the older authors, 

 to the Grenus Locusta, and although we have quite a number of the family LocustiadcB 

 within the county of Lancaster, yet, it now appears that we have not a single species 

 that properly belongs to the foreign genus of that name, either in the county or in the 

 State of Pennsylvania. These insects must, however, not be confounded with the in- 

 sect commonly called the ' ' seventeen year locust, ' ' which belongs to a different Order, 

 and is not, properly si)eaking, the true Locust. 



Nor does the Ust contain all within the county that properly belong to the order 

 Oi'ihoptera, as a number of them are still undescribed and undetermined. 



ORDER HEMIPTERA. 



The insects included in this order consist of those properly called Bugs. It is divis- 

 ble into two sections, called Uemiptera lleteroptera and Ilemiptera Homopiera; which by 

 many are regarded as two distinct orders. The general characters of the Heteroptera 

 are, two membranaceous wings that lie beneath two ovei-lapping horizontal wing-covers 

 or hemelytra, which have the basal half coriaceous and the terminal half membranaceous. 

 Mouth Tmtistellated, — that is, furnished with a Jiaustellujn, or sucking tube, instead of 

 jaws, and therefore they suck their food in a liquid state, instead of masticating it. 

 AntenncB usually long, and not terminating in a bristle. Ovipositor not exserted, or 

 developed. Scutellum usually large, in a few species extending over the wings, nearly 

 to the end of the body. 



In the Ilomoptera, the body is thick and convexed, instead of Hat, and all four of the 

 wings are usually membranaceous, deflexed, and not overlapping each other: Ovipositor 

 always exserted, or distinct; antennae short and inconspicuous, and the haustellum 

 appears to originate from the lower part of the head, near the breast, instead of directly 

 from the fi'ont of the head, as is the case in the heteroptera. The feet of both sections 

 have three tarsal joints, and, as in the Orthoptera., they are both active, from their exclu- 

 sion from the egg, until they reach maturity, or die. The only distinction between the 

 larva, pupa and imago, being the increase of size, and the development of wings. In 

 a few species the females are apterous, or wingless. In the first section, the most fami- 

 liar and widely known individual, is commonly called a Bed-bug, and in the second 

 section, the most conspicuous individual, is erroneously called the Seventeen-year locust. 

 It will be seen, however, that the only rei)resentatives of the true locusts which we have 

 in the county of Lancaster, or State of Pennsylvania, belong to a different order of 

 insects, and are essentially very different in their economy and habits. 



HETEROPTERA. Coenus? 



OEOCOEISA. delia Say. 



Having the Antcmae long and exposed. Padops'? 



PeNTATOMAD^. clubius^^at/. 



Pentatoma Olv. 

 ScuTELLERA Lam. lugens Fab. 



alternata Say. ligata Say. 



cinctipes Say. Raphigaster. 



histeroides Har. pensylvanica De G. 



Odontocellis? Eusacoris? 



scaraboides? carnifex Fab. 



Corimelaena Bv. Hymenarchis? 



unicolor Bo. neriosa Say. 



pulicaria Grrn. Lagrtjs? 

 Canopus? cinctus Har. 



globosus? Sehirus? 

 Pachycoris? bilineatus Say. 



graminus? ligatus Say. 



