THE JUMPING TREE BUGS. 653 



both it and clavus elevated above the plane of corium ; elytra 

 entire, cuneus present, membrane with one or two cells ; hind 

 femora swollen, saltatorial. 



The family is a small one, only four genera represented by 

 five species being recorded from the eastern states. They have 

 the general form and appearance of pygmy Saldulids, live on the 

 bark and dead twigs of trees, and jump vigorously when dis- 

 turbed. The principal literature treating of our species is by 

 Uhler, 1891; Heidemann, 1907; Gibson, 1917; Bergroth, 1924, 

 1925 ; McAtee & Malloch, 1924. 



KEY TO EASTERN GEXERA OF ISOMETOPID.-E. 



a. Pronotum not more than three times broader than its median length, 

 transversely convex; membrane (in our genera) with one closed 

 cell; cuneus broader than long, not surpassing middle of mem- 

 brane, its inner margin straight (fig. 4). 74 (Subfamily Isometo- 

 pinae) . 



b. Eyes very large, almost contiguous in front of ocelli (fig. 6) ; head 



about half as wide as hind margin of pronotum. 



I. Myiomma, p. 653. 

 bb. Eyes separated by at least half the width of one of them ; head 

 more than half as wide as hind margin of pronotum. 



II. CORTICORIS, p. 655. 

 aa. Pronotum very short and broad, over four times broader than its 



median length, not convex (figs. 10 and 13) ; membrane with two 

 closed cells (fig. 10) ; cuneus longer than broad, nearly reaching 

 apex of membrane, its inner margin deeply sinuate (fig. 10.) (Sub- 

 family Diphlebinse). 



c. Pronotum with front angles projecting in the form of a prominent 



lobe which is rounded on the outer side and contiguous with 

 eyes from within (fig. 10) ; second antennal with a black median 

 ring; carina of scutellum confined to apical third. 



III. Diphleps, p. 656. 

 cc. Pronotum with front angles but slightly projecting, not touching 



the eyes (fig. 13) ; second antennal unicolorous; carina of scu- 

 tellum percurrent. IV. Teratodia, p. 657. 



I. Myiomma Puton, 1872, 177. 



Elliptical, depressed species having the head very small, 

 rounded above, its front flattened and sloping inward toward 

 sternum ; ocelli located close together near middle of the very 

 narrow vertex and contiguous with eyes (fig. 6) ; beak reach- 

 ing fourth ventral; pronotum nearly three times as wide as 

 its median length, front margin concave, hind one sinuate, side 



74 The figures cited in text and keys of this family mostly refer to those 

 plate VIII. 



