OF NATURAL HISTORY. G'.H 



Body pale forru;^inous yollow : aiiti'iiiiie black, ferruginouM at 

 base, and with wliitc seiui-aniiulus uii tlie middle: scutcl with xtA 

 biusal angles coiiriect'.'d with the thorax by an elevated line : 

 winj^s yellowish, a black band before the middle, another beyond 

 the middle, connected in the form of a c with the black apical 

 margin ; central cellule pentangular, its basal and apical lines being 

 nearly parallel ; inferior wings with a dot in the middle, and 

 apical margin blackish : tcrguni with the third segment dusky 

 or black at its base : oviduct black, nearly as long as the abdo- 

 men : posterior tibiae blackish at tip. 



Length less than three-fifths of an inch. 



The remarkable resemblance which exists between the prchcnt 

 insect and the bi/asciafus nob. in point of color, renders it neces- 

 sary, in order to prevent mistake, that we should i>bserve that in 

 the L(/'asri(ifus the oviduct is not half the length of tlic abdomen, 

 and the central cellule of its wing joins the radial crllule in an 

 acute angle, ita basal and apical lines being confluent at the 

 point of the junction with it. 



8. C. CESTUS. — Wings hyaline, fasciate ; inferior wings dusky 

 at tip. 



Inhabits Indiana. 



9 Body rufous, almost sanguineous, opakc : antennao, excepting 

 the two basal joints, black with a white annulus in the middle ; 

 wings hyaline, a blackish band on [235] the middle, abbre- 

 viated before ; another blackish baud nearer the tip al)breviated 

 behind; tip, margin dusky ; second cubital cellule pentangular, 

 its basal and terminal lines not parallel : metathorax a little ru- 

 gose each side with a short compressed tubercle each side on the 

 declivity : tergum with the ba.sal segment polished ; third seg- 

 ment black at base : oviduct nearly as long as the abdomen : 

 pleura with the incisures punctured: posterior tarsi a little paler. 



Length half an inch. 



This is very much like C. caliptcrus nob., but the wings are 

 hyaline ; the cellules somewhat different; the inferior wings de- 

 stitute of a central spot ; the body is of a deep rufous color, &c. 



9. C. PLEURIVINCTUS. — Black ; segments of the tergum mar- 

 gined with white. 



Inhabits United States. 

 1835.] 



