BEMIPTERAHOMOPTERA APHIDES. 257 



The eccentric Constantino Kafinesque-.Schmalx, made the first attempt 

 IM classify American Aj (hides. 



Florissant. One specimen, No. HIC7. 



3. SlPHONOPHOROIlJES PKOPINyUA. 



The single specimen im which this species is based is not so well pre- 

 served as the last. The antenna- are broken in the middle, but were appar- 

 ently of a similar length. Thr wings are slender, fully three times longer 

 than broad. The postcostal is very broad, straight, and uninterrupted. 

 The first oblique vein is straight, and parts from the postcostal at an angle 

 nl' about fifty degrees; the second is straight at base, beyond considerably 

 arruate, separated by a narrow distance from the first, and placed at an 

 angle of scarcely forty degrees with the postcostal, so that the first discoidal 

 rell between them is very long and slender, and is about four times as broad 

 <>ii tin- hind margin as at the base. The cubital vein arises nearly twice as 

 far from the second oblique as that from the first, forks at rather less than 

 one-third way to the hind margin, and is very arcuate in course, so that 

 though its first fork approaches exceptionally near the second oblique vein, 

 the main stem reaches only twice the distance from the stigmatic vein. 

 This last vein arises opposite a point on the cubital vein one-third \\.i\ 

 from tin lirst to the second fork, and, strongly arcuate, passes at once fir 

 into the wing, and then becomes longitudinal, the stigmatic cell being 

 prettv large and long, about two-fifths the length of the wing. Legs very 

 slender. 



Length of fore wing, 5.5"""; breadth of .-.une, 1.5"""; length of fore 



fe -a, 1.75"""; fore tibia- and tarsi, 2.5"""; hind femora. 2.-J5""" ; hind 



tibia- and tarsi, 4.2""". 



Florissant. One >|n-rimen, No. .'3738. 



7. I.ITHAI'IIIS gen. nov. (Xt'Oit?, Aphis.) 



ll'-ad i -atln T .-mall with short frontal tubercles on which the antenna- 

 an- -iMti'd in elu-ic pn ixiniil \ . The first two joints of the latter as in 

 Siphonophoroides, the remainder also as there, Imt if anything even longer. 

 Fore \\ing with tin- .-tigmatir v in arising from the middle of the stigma. 

 ( 'ubital \ein twice lorkdl. ih,. iir.-i time ver\ far from its origin (which is 

 abnin a thin] \\ a \ from the ha-i- of id, lir-t obliqufi to the stigniatic vein) 

 VOL \in i , 



