IlKMIITKKA IIOMOITKKA ITLCiOKINA. 28S> 



tin- a]ic\ of the wing, the lower branch crossing the upper branch of the 

 lurk <>f the lower iiliuir vein and re. forking between the forks of the latter in 

 a somewhat peculiar manner, sometimes connected by cross-veins to the 

 lower branch of the lower ulnar fork; the lower ulnar branch forks a little 

 earlier than the upper and directly opposite the end of the united anal 

 veins. Venation of hind wings so far as seen a good deal as in Cixius, but 

 the fork inn- of the upper veins beyond the cross-veins is so deep as to run 

 fairly up to these cross-veins. 



Seven species are recognized in our Tertiary deposits. 



Table of the species of Diaplegma. 



Tin 1 two main branches of the uluar vein forking distinctly farther out than the first radial furcation. 



Apical, radial, and ulnar vetulets reaching the margin twelve in number 1. />. lialctemani. 



Apical, ladial, ami uluar veinlets reaching the margin not over ten in number. 

 1'pper ulnar branch distinctly disturbed in course at its first furcation. 



I'pper fork of lower ulnar vein passing iu a continuous and regular curve across the upper 



nlnar branches to thu margin '2. I), veterasceiis. 



Upper fork of lower ulnar vein interrupted in its regular course when it meets the upper 



ulnar branches 3. I), abductuin. 



Upper nlnar branch with its upper fork making a continuous or almost continuous line, uude- 

 viating in course. 



Tegmina nearly three times as long as broad 4. D. renerabile. 



Tegmina nearly or quite four times as long as broad. 



Cross-veins uniting the ulnar branches considerably farther from the apex of the wing 



than the breadth of the wing where they occur ">. /'. occultorum. 



Cros.H-veins uniting the ulnar branches only as far from the apex of the wing as the 



width of the wing where they occur G. D. ruinoutm. 



The lower nlnar vein forking almost exactly opposite the furcation of the radial 7. D. obdormitum. 



1. DIAPLEGMA HALDEMANI. 



The antennae are about as long as the tricarinate scutellurn. The teg- 

 niina are about three and a half times longer than broad, with very straight 

 costa, largest in the middle of the apical third, scarcely narrowing baseward 

 The radial vein forks exactlv at the middle of the wing, the lower uluar 

 branch at some distance beyond; the upper radial branch is two, the lower 

 three forked, since the first of its forks again subdivides. Opposite the 

 fnrration of the upper radial branch the upper ulnar branch forks widely, 

 its upper branch, an unusual circumstance and perhaps individual, locking 

 narrowly, its lower crossing to the center of the lower ulnar fork, where it 

 divides in two. the upper branch again forking, but there is no connection 

 with the lowermost ulnar nerviile. 



l.enutli of body. 1 : of trginiiia, LI.'. ; width of same, l.l.V 1 "": 



length of fore tibiae, 1' : taisi, ().l.V" m . 



\o| 



