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MILLIPEDS OF FAMILY LYSIOPETALIDAE LOOMIS 133 



pore area is short and broadly elliptic and occupies only about the 

 middle half of the outer margin, the rim above and below the impres- 

 sion strongly inflated and with pits similar to those of the primary 

 crests ; pore near the center of the impression. Below the poriferous 

 carinae are two primary crests distinctly higher than those of the 

 dorsum and with three to six very tiny denticles along the apex. 



Anterior subsegments with the posterior channels notably longer 

 than broad and separated by strongly raised, beaded lines ; reticula- 

 tions in front of the channels rather coarse, the longitudinal lines 

 through them low and fine. 



Last segment with 12 setae in addition to the two papillate hairs. 



Anal valves evenly convex, the margins moderately thick and 

 elevated. Preanal scale with a broad, shallow, transverse impression 

 near the middle, the lateral tablike processes large and conspicuous. 



Each gonopod with the upright piece expanded at the apex on 

 both sides of the pronged arm ; the upper, inner expansion with three 

 or four large serrations distally ; the lower, lateral expansion extend- 

 ing outward and curving somewhat forward, partially concealing the 

 base of the arm; the outer basal structure with a long and slender 

 fingerlike process adjacent to the upright piece (fig. 18, g). 



Males with a comb of hairs beneath the outer joint of the first three 

 pairs of legs; these legs and usually the seventh pair 7-jointed 

 (fig. 18, j), the other legs 8-jointed (fig. 18, A); in one male the 

 seventh legs are definitely 8-jointed (fig. 18, i). 



Males with the seventh legs greatly reduced in size, their tips some- 

 times only slightly exceeding the end of the second joint of the ad- 

 jacent normal legs, but occasionally they reach opposite the end of 

 the fourth joint of these legs; coxa with a hmg slender spine arising 

 from the inner anterior corner and curving up and back to near the 

 apex of the gonopods; in one specimen one of these spines is short- 

 ened and truncated and has a long erect seta continuing from the 

 apex; joint 2 very short; joint 3 long, usually longer than the re- 

 maining joints combined, the outer joints being reduced in size and 

 length. 



rype.— Male, U.S.N.M. no. 1248. 



Remarks. — Numerous specimens collected 2 miles east of "Indian 

 Head", on the Indio-El Centro Road, southern California, Febru- 

 ary 2, 1929, by Dr. O. F. Cook and W. H. Jenkins. A female ap- 

 pearing to belong to this species was found beneath a stone in Mon- 

 sen Canyon, Eagle Mountains, near Shavers Well, Riverside County, 

 Calif., April 6, 1930, by H. F. Loomis. 



