NO. 2134. NORTH AMERICAN COLLEMBOLOUS INSECTS— FOLSOM. 511 



The single specimen at my. disposal was lost before I had ascertained 

 the number of its eyes. 



NEANURA SERRATA, new species. 

 Plate 24, figs. 231-235. 



General color dark blue; ground color grayish blue, mottled; 

 segmental tubercles blackish. Eyes (fig. 231) five on each side. 

 Postantennal organs absent. Antennae subequal to head in length, 

 separated basally; last two segments confluent. Olfactory hairs of 

 fourth antennal segment (fig. 232) five or six: thi^ee or four mner, 

 one outer, and one dorsal. Sense-organ of third antennal segment as 

 in figure 233. Unguis (fig. 234) stout, curving, untoothed. Tibio- 

 tarsal hairs as in figure 234. Anal segment not visible from above. 

 Basal antennal segment with one dorsal tubercle. Head with 12 

 tubercles, as follows: one between the bases of the antennae; five 

 in a transverse row, including the two ocular tubercles; four in a 

 posterior transverse series, in which the tubercle at each end repre- 

 sents two united tubercles; two small tubercles, each antero-lateral 

 in position. First six body segments each with eight tubercles, six 

 of which are visible dorsally. Seventh segment with six tubercles, 

 four of them visible from above. Genital segment with four, two 

 evident doi-sally. Anal segment with four, visible only ventrally, 

 two being supra-anal and two infra-anal. Clothing of conspicuous 

 stout yellow setae, serrate or feathered (fig. 235), mostly very long; 

 the length of the longest being more than one-third the greatest 

 width of the body; in addition to these there are numerous minute 

 simple setae. Length, 2.4 mm. 



Found under boards and rotten logs in moist soil. One specimen 

 had teleutospores of Uredineae in the ahmentary canal. 



Oregon. — Corvallis, February 5, March 22, H. E. Ewmg; March 

 11, A. L. Lovett. 



Cotypes.—C&t. No. 19908, U.S.N.M. 



NEANURA ORNATA Folsom. 

 Plate 7, fig. 6; plate 24, figs. 23G-240. 

 Neanura ornata Folsom, 19026. — Axelson, 19036. — Caroli, 1912. 



White (fig. 6). Head (fig. 236) slightly longer than broad, rounded 

 triangular. Eyes (fig. 236, c, e, e) not more than three on each side, 

 in longitudinal alignment; two are close together and immediately 

 behind the base of the antenna; the third is considerably behind 

 these. The eyes are rudimentary; they lack pigment, and even the 

 cornea, especially of the posterior eye, is frequently indistinguishable. 

 Postantennal organs absent. Antennae (fig. 237) barely more than 

 half as long as the head, with segments related as 5:4:4:6; basal 



