1910] Diplopoda from the Western States 23' 



Conotyla coloradensis sp. nov. 



Dorsum and sides brown, the prozonal divisions of segments some- 

 what Hghter than rest; sometimes finely areolated with paler brown. 

 Lower region of sides and the venter paler, light brown to yellowish. 

 No black bands or spots. Legs yellowish proximally, the distal joints 

 brown or marked with brown in spots and streaks. Antennae brown. 



Head hirsute, the vertex more sparsely so than the frontal region. 



Lingual lamellae of gnathochilarium widest anteriorly, incurved 

 posteriorly, posterior arms a little divergent, three times as long as 

 greatest width. Stipites five and a half or more times as long as the 

 greatest width. Spatula conspicuous, distally subtriangular. Mentuni 

 one-half as long as greatest width. 



Eye areas subtriangular, but with the sides convex; ocelli about 22, 

 in five curved series, counting from outermost mesad as follows: 5,5,5,4,3. 



Antennae very long, proportions as represented in PI. XXXIII, fig. 

 2. Length 4.2 mm. 



A fine median longitudinal keel over all segments excepting the last. 

 Carinae increasing in size from the first caudad. Inner setae becoming 

 relatively farther and farther from middle line in going caudad, these 

 setae inserted in a wide longitudinal depression extending along each 

 side, the dorsum between the depression a little convexly elevated. 

 Setae, as usual, becoming directed more and more strongly caudad in 

 proceeding from anterior to posterior segments. 



First segment of the usual form, the anterior margin broadly extended 

 cephalad mesally and fitting into excavation of head, the lateral por- 

 tions of margin a little incurved. Carinae small, continuous with 

 anterior margin of plate. Innermost bristle about one-third the dis- 

 tance from median to the edge of the carina of the corresponding side, 

 in transverse line with the more anterior of the lateral bristles which is 

 situated cephalad and considerably mesad from the posterior one, the 

 latter close to the caudal margin. Segment considerably depressed or 

 furrowed transversely, the inner setae located in this depression. Setae 

 erect. 



Anal scutum truncate caudad, the posterior margin weakly incurved. 



Anal valves not equalling the scutum, widely rounded and broadly 

 margined. The three bristles nearly equidistant, the most ventral 

 three or more times as far from the ventral scale as the most dorsal 

 is from the scutum. 



Anal scale sub-trapezoidal, the lateral and cephalic margins weakly 

 convexly rounded, the caudal distinctly incurved between the two 

 long bristles. 



Appendages of second segment of female conspicuous, strongly 

 enlarged distad, the distal end with long bristles. A sub-lobe sheath- 

 ing the cephalic surface of main appendage, this bearing long bristles 

 apically. See PI. XXXIII, fig. 7. 



Locality — Colorado (T. D. A. Cockerell). 



