116 TERTIARY INSECTS OF NORTH AMERICA. 



again as broad. AnteniifB nowhere well preserved, but apparently longer 

 and with more numerous joints than in E. fossarum. Pronotum as broad 

 as the head (?) and very short, probably more than twice as broad as long, 

 the hind margin not forming with the sides a continuous curve, but in its 

 middle half only slightly convex. Mesonotum and metanotum quadrate, 

 broader than the head, the mesonotum somewhat the larger, at least half as 

 broad again as long. Abdomen rather stout, longer than the rest of the 

 body, the sides nearly parallel, the tip broadly rounded, and, as far as can 

 be made out, unprovided with terminal appendages. Legs moderately long 

 and stout, the tibiaj armed with a pair of spines at apex, the front tibiae 

 about as long as the jironotum. 



Wings long, slender, and uniform, four times or slightly less than four 

 times as long as broad, the middle of the front pair reaching the tip of the 

 abdomen, broadest at or slightly beyond the middle, the lower border 

 slightly arcuate throughout. Costal margin straight in the basal three- 

 fourths of the wing. Scapular vein parallel to the margin, the subcostal 

 area scarcely infumated. Veins below the scapular not determinable. 

 Basal scale small, triangular, equilateral, the sides straight excepting the 

 costal, which is very slightly convex and prominent. 



This species differs from the preceding by its slightly smaller size, 

 squarer pronotum, and differently shaped head. 



Length of body, 5.25-7, av. 6.3""° ; of abdomen, 2.8-3.5, av. 3.2°"° ; 

 breadth of abdomen, 1.5°""; length of wing, 7.5-8°'"; breadth of same, 2"°-. 



Named for Mr. T. L. Mead, whose collection of Florissant insects he 

 has permitted me to study. 



Florissant. Four specimens, No. 19 (Coll. T. L. Mead), and Nos. 31, 

 1203, 8062. 



A single specimen of a wingless white ant has been found, apparently 

 belonging to this species or to E. fossarum. It measures 3.75°"" in length, 

 and is of the ordinary form of the worker, with rounded head and con- 

 stricted prothorax, bearing a general resemblance to the only other known 

 fossil termite larva, figured in Berendt's work, but has the head more pro- 

 duced anteriorly and the abdomen less distended. 



Florissant. One specimen. No. 6100. 



