174 TERTIARY INSECTS OF NORTH AMERICA. 



below the middle branchlet of the upper radial branch. All these veins, 

 excepting the pterostigmatic termination of the uppermost bi'anch of the 

 radial, are straight. The cubitus is also straight until it forks a little before 

 the middle of the wing ; its upper branch is a little curved, and divides just 

 below the forking of the lowest radial branch ; its lower branch forks almost 

 immediately, emitting at once three veinlets, the middle one of which is 

 nearly continuous with the main stem, the others curving in opposite senses 

 on either side of it. Below this the veins are not so readily determinable, 

 and their description is omitted until further specimens are obtained ; the 

 only variation in the neuration of the two wings consists in the middle fork 

 of the lower branch of the cubitus, which, in the hind wing, is not con- 

 tinuous with the main stem, but originates a very little beyond the others 

 from the lower fork. The legs are spinous throughout; the tibiae are also 

 armed at the tip with very long, straight, parallel spurs, and the tarsal 

 joints with short spurs. The abdomen is greatly elongated, the first four 

 joints subequal and nearly as broad as the slender thorax, but as a whole 

 tapering slightly, and not greatly surpassed by the wings, the following 

 joints greatly attenuated, the ninth, or terminal joint, composing the for- 

 ceps, unfortunately lost. 



A fossil species referred to Panorpa, and figured by Brodie^ from the 

 Purbeck beds of England (Panorpa gracilis Gieb.), is very small, and pos- 

 sibly may be more nearly related to Holcorpa than to Panorpa, for Avhile 

 the general arrangement of the veins, with tlie notable exception of the 

 cubital, is similar to what is found in Holcorpa and very diff"erent from 

 their disposition in Panorpa, no cross-veins whatever can be traced. The 

 figure, however, is too small, coarsely executed, and is described by Gie- 

 beP as supplied abundantly with cross-veins ! It certainly is not in my 

 copy of Brodie's work. 



Holcorpa maculosa. 



PI. 14, Figs. 4, 5. 



Holcorpa maculosa Scudd., Bull. U. S. Geol. Surv. Terr., IV, 542 (1878) ; in Zittel, Haudb. d. Palaeont., 



I, ii, 778, Fig. 984(1885). 



A single specimen with beautifully preserved wings and fragments of 

 the rest of the body. The antennae (which are not fully preserved) appear 

 to have been more than half as long as the wings, the middle joints 0.17"™ 



I Fos3. Ins. Sec. Rocks Engl., pi. 5, fig. 18. - lus. der Vorw., 258. 



