AET.18 NEW GENERA OF MILLIPEDS COOK AND LOOMIS 21 



length, together longer than the last joint with the claw included; 

 last joint attenuated apically and with a long slender claw. 



Type.—Q^i. No. 979, U.S.N.M. 



Two males and four females of this species were collected on 

 Mount Tamalpais, near San Francisco, Calif., on November 23, 

 1919, by O. F. Cook and H. F. Loomis. They were found in Spring 

 Valley in thick oak woods, scattered in the stony soil immediately 

 beneath the surface layer of dead leaves. The females appear to 

 have a conspicuously greater number of segments, as both male 

 specimens were mature. 



The evenly convex dorsum and thickened sloping carinae are 

 further differences from Dolistemis Fanzago, where only the middle 

 of the dorsum is convex and the carinae somewhat concave, with the 

 margins rectangular and somewhat ascending. 



According to Fanzago's descriptions and figures of Dolistenus^ the 

 body is very slender with narrow, short, strongly carinate segments. 



a 6 



Fig. 5. MiTOCTBE ADRIPORTAE. O. GONOPODSj VENTEAL TIHW. 6. LbG, POS- 



TBBIOE VIEW 



Antennae with rather short, thick, rounded joints, the second joint 

 longer and more slender than the others, joints four to six gradually 

 thicker, joint seven very small, surface of segments minutely pilose,^ 

 with a distinct median suture and a transverse groove ; first segment 

 ovoid, without the longitudinal and transverse sulcus and with no 

 trace of carinae. Posterior segments with carinae slightly produced,^ 

 the last segment swollen and obtuse ; legs very short, even in relation 

 to the narrow body ; length 23 to 36 mm., number of segments attain- 

 ing 100. 



ISCHNOCYBE, new genus 



Type. — IscKnocybe plicata^ a new species from California. 



Diagnosis. — Somewhat intermediate between Andrognathus and 

 BraGhyGy'b&; the body slender and narrow as in Ancbfognathus^ but 

 the repugnatorial pores not stalked and the segments with two rows 

 of dorsal tubercles, as in BracJiA/cyhe. 



8Atti, Soc. Veneto. Trentino, vol. 4, p. 62, Oct. 1875. 



