nEMIPTEBAHOMOPTBEA APHIDES. 2)7 



which arises in dose proximity and scarcely diverges from the other in 

 the first third of its course imd then bends outward, so that the first dis- 

 coidal cell must 1 < three or four times broader on the hind margin than at 

 the base. Cubital vein arising four times as far from the second oblique 

 vein as it is from the first, and yet not quite half-way from the first oblique 

 to the stigmatic vein: it first forks only a little less than halt-way to the 

 hind margin, and no second furcation can be seen, as the wing is broken. 

 The stigmatic vein arises opposite the first furcation of the cubital vein and 

 curves well down into the wing, so that the stigmatic cell is large, but its 

 relative length can not be determined. 



Length of body, 5.5""" ; wing, 6.-J5""". 



Florissant. < >ne specimen, No. 4475. 



2. OKYCTAPIMS LESUEURII. 



Head and thorax black, abdomen exceedingly pale. \Vings apparently 

 about three times longer than broad, the postcostal vein very heavy, angu- 

 lated in the slightest possible manner next the oblique veins, the stigma 

 very long and slender. The first oblique vein parts from the postcostal 

 at an angle of fifty-five degrees, and is faintly sinuate ; the second, aris- 

 ing close to it, is arcuate apically, but otherwise straight, and parts from 

 the postcostal at an angle of forty-five degrees, so that the discoidal cell 

 between them is about four times as broad along the hind border as at the 

 base. Cubital vein indistinct at base, but apparently arising four times as 

 far from the second oblique vein as this from the first, and about midway 

 between the first oblique and the stigmatic vein : it first forks at almost 

 half-way to the hind border, and in passing to that its first fork gradually 

 approaches the second oblique vein. The stigmatic vein appears to arise 

 about half-way between the two furcations of the cubital vein, but no more 

 can be said of it from its imperfection on both wings. The fore legs are 

 verv slender. 



Length of body, 4.5""": wings, 5.5 mm : fore femora, 1.1""" ; fore .tibia 1 

 and tarsi, 1.5""". 



In memory of 'the earl\ 'American paleontologist, Charles Alexandre 

 Lesueur. 



Florissant. < >ne specimen, No. 9405. 



