NO. 2134. NORTH AMERICAN COLLEMBOLOVS INSECTS— FOLSOM. 501 



My additions to Harvey's description have' been made from a study 

 of two of the CO types. 



Described originally from five cotypes, found on a decorticated 

 log in low damp woods, Orono, Maine, September, 1897, by F. L. 

 Harvey. 



PSEUDACHORUTES COMPLEXUS MacGillivray. 

 Plate 20, figs. 174-180. 

 Gnathocephdlus complexus MAcGii.iAvnA.Y, 18936. 



Dark blue, with a lateral row of pale spots. Head strongly pro- 

 duced between the antennae. Eye patches black, small, convex. 

 Eyes eight on each side of the head (fig, 174). Postantennal organs 

 (fig. 175) with about 20 to 25 peripheral tubercles arranged in an 

 oval. Antennae (fig. 176) shorter than the head, basaUy approxi- 

 mate, with segments as 12:9:8:12 in relative lengths; basal segment 

 one-half broader than long; second tlu'ee-c{uarters as broad as the 

 first, cup-shaped; third and fourth each one-half as broad as the first 

 and separated by an indistinct oblic{ue suture; fourth segment 

 rounded-conical. Mouth parts (fig. 177) suctorial, elongate, pro- 

 jecting in a cone one-half as long as the head. Body stout, gradually 

 dilating. Tibiotarsus with two large white spots; femur with one. 

 Ungues (fig. 178) long, slender, uniformly tapering, strongly curving, 

 untoothed, basaUy pigmented, shortest on the first pair of feet. 

 Unguiculi absent. Tenent hairs absent. Furcula short, extending 

 to the posterior border of the genital segment. Manubrium stout. 

 Dentes (fig. 179) subcylindrical, with 11 or more large conical dorsal 

 tubercles. Mucro (fig. 179) two-thirds as long as dens, elongate- 

 triangular in lateral aspect, terminating in a small rounded upturned 

 lobe. Anal spines absent. Antennae, legs, and furcula with many 

 long stiff setae; anal and genital segments with numerous stiff setae 

 of moderate length; remaining body segments almost naked, each 

 with a single transverse row of short curving setae (fig. 1 80) . Cuticula 

 finely tuberculate. Length, 3-4 mm. 



The present description and figures of this species have been made 

 from a single cotype sent to me by MacGillivray. 



Olympia, Washington, T. Kincaid. 



PSEUDACHORUTES LUNATUS, new species. 



Plate 20, figs. 181-186. 



General color grayish blue; pigment blue, mottled, interspersed 

 with close rounded pale spots; sternum, legs, and furcula unpig- 

 mented; antennae blue. Eyes (fig. 181) eight on each side; eye 

 spots black. Postantennal organs (fig. 182) with 10 to 12 peripheral 

 tubercles arranged in an oval. Antennae shorter than the head; 

 third and fourth segments confluent. Mouth parts projecting in a 



