108 mDtK. HOMOPTEKA. 



uuU'vt wlipn A fruit-trrr bt«comf« iufcstcxl, iu which cmc all the «lcnd hranchw mny Iw 

 rcuiovcti ami hurnwl. 



Cicada lAMCiUAkiit. Dogday Uarvatjly. ( I'laU- ix, fig. 3.) 



BiMiy black : the hcml beneath, breotft aiid ttitleA mealy ; tup of the head and thurax 



oniamcntfd with ullvi* grrfii liuf»ci»nuecte<l ti>gcthcr on as u> furiii chunictrn*, t-m-of 



which ujH.ii the th<>rux rfM-iiil >!«•!« tin- litt«r W. l^K", fn)iit of tlu- ]>riiiri]>ul vein* of 



the wiiJK covin* iiiul wiij>?!* tilfjctl with (^rttn. The lx«dy of thi.s .xi>eci€-!t is thicker nml 



|iM|M*rtioiially sliortcr than the sifttrndtiim : uUluiueu of the luole ta|>er» rajiidly. 



Ai>i>vJirji late in July, ami continue?* into S»i'tcmUT. 



According to the observations of Mr. Hahkis, this .sjn-cies is very regular in the time 



of iu ai>iK*urance : for aiany years in succession, it has Ini-n heard lor tlu- first time at 



Cambridge on the twenty-fifth day of July, U-tweeu the hours of ten iu the forem on and 



two in tlie al1erm>on. It is therefore uu annuxU visitor. In which resi>ect it differs widely 



from till- iireceiUni; sjK-cies, while its other habits are much the sjime. It dejiosits Its eggs 



in the extn-inities of the branches of various tre«-s. It is not jiarticularly Injurious to friiit 



trees, nor imlee.l to any other species of vegetation ; l>esldes, it never lias a|ipcarcd in 



sulhiient numlnrs to excite any apprehension of injury. 



Cicapa noveoobacknsis. ( Plate ix, fig. 2.) 



Ikxly black : veins of wing-covers and wings, thorax and abdominal rings edgrd or or 

 namented with orange. 

 This species is smaller than either of the preceding ; but it apin-ars annually, and han 

 the same hal>its as to the m<->de of dei«isiling its eggs. It is never in sufficient niunl>crs to 

 inflict serious liyury to forest or fruit trees. 



Troo-hoppors. L^.tf-hopprrv. f(e. 



Form trianguliif, tml variable in llie liilVereiit genera ; e\ilits two; mu-nal in-iniiin nt- 

 none ; bK-oniotiou by leaps aided by wings. 



Tlies*' grotesipie in.si-cts inhaiiit the trunks, limks and leares of trees : they are small; 

 colors green, gray, with sjK>t> or cloudiness of the wines ; faces oft«n vertical or nearly 

 so, with the thorax and anterior parts thick, wlunce they ta|>er rapidly to the extreme 

 points of the wings ; legs furnished with spines. The sjiecies arc very nuniennui, each trw 

 and shrub being inhabited by its own {Kculiar kind. 



As this group of insects have habits much the same as the cicadiaus. and obtain their 

 nutriment by sucking the juices of plants. It Is supjioscd that in some cases they may U> 

 detrinientid to vegetation : they cannot, however, ii^jurv the farmer very materially, 

 though as a cla<^ they are i^uite numer<'ius 



