256 TERTIARY INSECTS OF NORTH AMERICA. 



than the second fork of the cubital, sometimes to a considerable degree 

 arcuate at base but beyond horizontal, so that the stigmatic cell is both 

 long and slender, from a third to two-fifths the length of the wing. Hind 

 legs about as long as the antennae. 



Length of body, 4'"'" ; fore wing, 5-6™™ ; breadth of same, 1.5-2™™ ; 

 length of antennae, 5.5™™ ; legs of one individual as follows : fore femora 

 1.5™™; fore tibiae and tarsi, 2.25™™; middle femora, 1.25™™; middle tibia? 

 and tarsi, 2.15™™; hind femora, 2. 25™™; hind tibia? and tarsi, 3™™. 



Florissant. Fifteen specimens, Nos. 1079, 1339, 1867, 2396, 2881, 

 3029, 5747, 7934, 8889, 9574, 10205, 11562, 13562, 14450, and, from the 

 Princeton Collection, 1.986. Besides these, Nos. 1703, 3284, and 5491 from 

 Florissant, should probably be referred here. 



2. SiPHONOPHOROIDES KAFINESQUEI. 



The greater part of the creature, excepting the abdomen, is preserved 

 in the single specimen obtained. The antennae are nearly as long as the 

 hind legs and considerably longer than the wings. The wings are very 

 slender, fully four times longer than broad. The postcostal except at base 

 is straight, slender, and runs uninterruptedly into the exceptionally slender 

 fusiform stigma. The first oblique vein is straight, or slightly arcuate, and 

 parts from the postcostal at an angle of nearly sixty degrees ; the second 

 oblique vein is also straight or slightly arcuate, is moderately distant at base 

 from the first oblique, and parts from the postcostal at an angle of forty -five 

 degrees, so that the first discoidal cell is four times as broad on the hind 

 margin as at the base. The cubital vein arises more than twice as far from 

 the second oblique vein as that is from the first and only a little less than 

 half-way fi'om the first oblique to the stigmatic vein, forks about two-fifths 

 way to the hind margin, and with its first fork runs completely parallel to 

 and distant from the second oblique vein ; it is bent at its fork and there- 

 after runs longitudinally, forking again about half-way to the tip and run- 

 ning close to the stigmatic vein. This last arises very much nearer the 

 first than the second cubital fork, and except at base is but little arcuate 

 and very longitudinal, so that the stigmatic cell is exceptionally slender 

 and nearly half as long as the wing. Legs very slender. 



Length of fore wing, 5.25™™; breadth of same, 1.25™™; length of 

 antennae, 6.5™™; of hind femora, 2.5™™; hind tibite and tarsi, 3.75" 





