1903.] NATURAL SCIENCES OF PHILADELPHIA. 35 



MYRIOPODS FROM BEULAH, NEW MEXICO. 

 BY RALPH V. CHAMBERLIN. 



The chilopods and diplopods noted arid described in this paper com- 

 pose a small collection kindly sent me for determination by Prof. T. D. 

 A. Cockerell, to whom I wish here to express my thanks. All were col- 

 lected at Beulah, N. M., which is at an elevation of about 8,000 feet 

 abovd*sea-level and within the Canadian zone. The forms prove to be 

 largely peculiar, each being easily distinguished from any previously 

 described species. The Geophilus is especially interesting. 

 Lithobius glyptocephalus sp. nov. 



Diagnosis. — Angles of the 9th, 11th and 13th dorsal plates produced; 

 articles of antennae 20; ocelli 16-18 in three series ; prosternal teeth 6-6, 

 7-7; spines of first legs beneath 1, 3, 2, of penult 1, 3, 3, 2, of anal 1, 

 3, 3, 1 ; coxal pores 6, 7, 7, 7-6, 7, 8, 8, transverse; length 20 mm. 



Description. — Body brown to light-brown, head and posterior dorsal 

 scuta darker, reddish-brown or chestnut; venter paler; legs colored 

 similarly to body, but distal joints, especially the first tarsal, pur- 

 plish ; antennae chestnut proximally , the terminal portion light-brown ; 

 dorsal plates roughened, sparsely pilose, especially caudad; antennae 

 moderately pilose with stiff hairs. 



Head subcordate, sHghtly wider than long (12: 11.5); a strong fur- 

 row extending dorso-mesad on each side, each furrow dividing into two 

 branches, the anterior of which curves forward to unite with its fellow 

 of the opposite side just back of the frontal suture, the posterior 

 branches uniting similarly in front of caudal margin of head. 



Ocelli in a narrow elongate patch which is widest behind; 16-18 in 

 number, arranged in three series (1+7, 6, 4-1+5, 5, 5) ; rather large and 

 distinct. 



Antennae short, consisting of 20 articles of moderate length, the ulti- 

 mate long and pointed at the end. 



Prosternal teeth 6-6, 7-7, uniform. 



Angles of the 9th, 11th and 13th dorsal plates produced; plates more 

 or less distinctly depressed along the median longitudinal line ; posterior 

 margin of principal plates, except 7th, sinuate, posterior margin of 7th 

 straight; principal plates strongly marginate laterally and posteriorly. 



