THE CANADIAN ENTOMOLOGIST 229 SOME FOSSIL INSECTS FROM FLORISSANT, COLORADO. BY T. D. A. COCKERELL, UNIVERSITY OF COLORADO, BOULDER, COL. The insects now described have a very modern aspect. The anal cell of Venallites, taken by itself, may be thought of as primi-tive, but the fly is otherwise a specialized type. Certainly there has been little advance in insect evolution since the Miocene, but many genera have become extinct. HOMOPTERA Echinaphis new genus (Aphididte) Stout, with long antennae; the two basal joints short as usual; the first somewhat gibbous at apex on inner side; front broad; abdomen with six longitudinal rows (the outer was lateral) of about six very strong black spines; the apex of abdomen, which is broad, with a transverse (marginal) row of six still larger and stronger spines; cornicles not evident, probably small; hind wing of rather coriaceous texture, the venation essentially as in Chaitophorus. Anterior wings not preserved in type. Echinaphis rohzueri, n. so. Length, 3 mm.; width of abdomen, L75 mm.; length of hind wing a little over 2 mm.; dark colored, with the anterior legs clear ^, ferruginous; wings reddish; front and ^ « sides of thorax without hairs. The ■■# ' vw^ <J^ \\l\i\i Ai following measurements are in mi-»^'^^N\yF^^, # -' !«}'/* crons: Width of front between eyes "ii^ ^,^''\ .• >' "'-vij'^^ 320; length of first antennal joint 128; / ^ '^ \ \ \ ^^ second 80; antenna, from base of V U \ \ third joint to apex, 1665; length of a pj^ g dorsal spine about 160; of a caudal Er/,i:a/,/z,-s rokweri. ckii. oneabout270; distance between the wing-veins (Cu and M.) at base (separation from Rs) about 112. The veins are nearer together at base, and less parallel than in Chaitophorus populicola. Miocene shales of Florissant, Station 13 (5. A. Rohiver). This singular species is quite unlike any of the fossil Aphids previously described from Florissant. In the development of spines, it has a certain resemblance to the living Chaitophorus spinosHs Oestl., found on oak in Minnesota. Sipha glyceric (Koch), which is also spiny, has much shorter antenna;. Close to July, 1913.
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