552 



AUTHENTIC HISTORY 



funipenellus Fch. 



niarginellus Fcli. 



castanea Fch. 

 Brysocrypta. 



ulmicola Fch. 

 Phylozera. 



caiyaefolia Fch. 

 Lachnus. 



caryae. 



strobi Fch. 



lorifex Fch. 

 Phylloxera. 



castanea nid. 

 Ghermes. 



pinifolia Fch. 



loricifex Fch. 



Thripid^. 



Theips Limu 



cerealis? Nob. 

 Phlaeothrips. 



mali Fch. 



caiyse Fch. 



GALLINSECTA. 

 Having the tarsi one-jointed, terminated by 



a single claw; males two wings, and mouth 

 obsolete; females wingless. 



COCCID^.. 



ASPIDIOTIS. 



conchiformis GmJ. 



gossipii Fch. 



furfur us Fell. 



cerasi Fch. 



pinifolia Fch. 



juglanstelis Fch. 

 Coccus Linn. 



pinicorticis Fch. 



harrisii Wlk. 

 Lecanium. 



pyi'i Chrk. 



percosia Fch. 



acericola Wlch. 



ceracifer Fch. 



coryabati Fch. 



caryae Fch. 



juglandifex Fch. 



corylifcx Fch. 



quercifex Fch. 



quercitronis Fch. 



niaclurae Wlch. 



The larger number of the insects belonging to the two sub-ordei\s Ileteroptera and Ilomop- 

 tera are small and exceedingly fragile, and therefore the preservation of specimens is 

 attended with great difiiculty . Probably not more than the one-half of those that inhabit 

 Lancaster comity have been described. ^Moreover, in certain seasons favorable to their 

 increase they will be found in vast immbers, but an unfavorable season intervening, 

 they will disappear and may not be seen again for a number of years. This has partic- 

 ularly been the case with the "Oat- Aphis," or Aphis avena. The famous Cicada sep- 

 iendecim, or so called "Seventeen year locust," which belongs to this order, only 

 appears once in seventeen years. It is on record that it has apijeared regularly every 

 seventeen years, in the County of Lancaster, for one hundred and forty years, or more, 

 and never fails at the proper time. Its last appearance was in the beginning of June, 

 1868, in numbers far greater than in 1851 or 1834. 



ORDEPt NEUROPTEPtA. 



The insects belonging to tliis order are commonly called " Dragon Flies," or "Devil's 

 Needles," or "Snake Doctors." One or more of these names are applied to thom in 

 different localities, or by ditl'ei'ent persons in the same locality. It also includes those 

 insects which are known under the common names of May-flies, Day-flies, Ant-Lions, 

 Lace-wings, Caddice-fiies, and many others. Perhaps the most perfectly organized 

 insects, so far as concerns sight and flight, are found in this order. They are charac- 

 terized as having four, naked, membranaceous wings, of equal consistency throughout, 

 very much reticulated, and in the larger number, nearly, or quite, of an equal size. In 

 some species, during repose, the wings are horizontally extended at right angles from 

 the body; in others the inner surfaces are applied against each other, and in others 

 again they are deflexed at the sides. Head frequently of a large size; mouth provided 



