318 



PSYCHE. 



[March, 1902 



cylindrical segment, and clothing of long 

 subequal setae. 



Each of the three species discussed 

 above is characterized below. Unless 

 otherwise specified, the material referred 

 to was collected by the author, and is 

 owned by him ; examples of each species, 

 however, have been given to the Muse- 

 um of Comparative Zoology, Cambridge, 

 Mass. 



Achorutes nivicola Fitch. 

 (Figs, i-ii.) 



Podura nhncola Fitch, Amer. Journ. 

 Sc. Agric, vol. s(i847)pp. 283-284 and 

 vol. 6 (1847) P- '5-; Winter Ins. E. N. 

 Y. ([847) pp. 10-11 (reprinted by Lint- 

 ner, Second Rept. (1885), pp. 204, 205, 

 244. Fitch, Rural New Yorker, vol. 

 8 (1857). PMcMinn, Proc. Acad. Nat. 

 Sc. Phila., vol. 4 (1849) P- ■■\^- ■ Ash- 

 ton, Proc. Ent. Soc. Phila., vol. i (1861) 

 p. 32 (repr. Lint. Sec. Rept., p. 204). 

 ? Walsh, Riley, Amer. Ent, vol. 1 (1S69) 

 p. 18S. ? Field and Forest, vol. 2 

 (1877) pp. 141^-14^ (repr. Lint. Sec. 

 Rept., p. 205).-^ '^ 



Achorutes sccialis Uzel, Thys. Boh. 

 (1890) pp. 69-70, tab. 2, figs. 16-19. 

 Schoit, Syst. Verb. (1894) pp. 81-82, 

 taf. 7, figs. 6-8. Schaffer, Coll. Ham- 

 burg (1896) p. 172. 



Achorutes nivicola MacGillivray, Can. 

 Ent., vol. 23 (1891) p. 274. 



Schoturus nivicola MacGillivray, Can. 

 Ent., vol. 25 (1893) p. 316. Dalla 

 'J'orre, Gatt. Arten Apt. (1895) p. 13. 



Achorutes spinifer Schaffer, Coll. Ham- 



burg (1896) pp. 172, 174, taf. 3, fig. 51. 

 Achorutes diversiceps Lintner! Eleventh 

 Rept. (1896} pp. 253-254, figs. 23-25. 

 (F.ef. to Country Gentleman, Mar. 22, 

 i879' P- 327-) 



Dark indigo blue throughout (fig. i). Eyes 

 (fig. 2) sixteen. Postantennal organs (fig. 3) 

 of four elements. Antennae (fig. 4) almost as 

 long as the head, with segments as 7 : 9 : 10 : 15 ; 

 basal segment subglobose, second and third 

 subcylindrical, fourth rounded conical. Body 

 elongate, abdomen subfusiform, last segment 

 cylindrical. Superior claws (fig. 5) stout, 

 slightly curved, unidentate two fifths from 

 the apex ; inferior claws half as long, basally 

 subovate, apically acicular ; one long tenent 

 hair with a minute knob; distal tibial hairs 

 minutely knobbed. Manubrium as long as the 

 rest of the fuixula ; denies (figs. 6, 7) stout, 

 subcylindrical, apically broad and rounded, 

 bearing four to six prominent, acutely conical 

 teeth, of which one is more lateral than the 

 others ; in addition, there are usually fifteen 

 to seventeen small outer teeth ; mucrones 

 (fig. 8) inserted on inner side of the apex of 

 each dens and rather boat-shaped; in profile, 

 suboblong, feebly curved, apex refuse or 

 emarginate. Anal spines (figs. 9, 10) two, 

 small, conical, erect, upon low, separated 

 papillae. Clothing (fig. 11) of numerous 

 long curving hairs and few short curved 

 setae. Length, 2 mm. 



Norway, Maine, May 7, F. Howe, Jr.; 

 OronO; Maine, March, April 15, May 6, 

 F. L. Harvey. Arlington, Massachu- 

 setts, April 12, Belmont, Massachusetts, 

 April 19, May 5 ; Winchester, Massachu- 

 setts, February 9, R. W. Hall ; Karner, 

 New York, April 26, J. A. Lintner (N. 

 Y. State Coll.) ; Otto, New York, J. H. 

 Comstock ; Osceola, Pennsylvania, A. 

 D. MacGillivray. 



