336 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



4. Gordius densareolatus Montg. 



Coll. Cal. Acad. Sci. : 8 , Lake, San Francisco, Cal. 



The posterior end of this specimen was as in the type 

 (cf. Montgomery, 1. c), except that there was only a slight 

 precloacal groove. 



In my first description of this species (1. c.) the cuticle 

 of the female only was described. I have since re-examined 

 the type of the male (Montana, Leidy coll., No. 5063) and 

 find the cuticle in general like that of the female, except 

 that the areoles show less tendency to confluence and are 

 more rounded in outline. 



5. Paragordius varius {Leidy.) 



Coll. Cal. Acad. Sci.: 2 S <3 , 3 9 9, San Jos6 del Cabo, Baja Cal., July, 

 1896; 9, St. Helena, Napa Co., Cal. Coll. Stanford Univ., collected by 

 C. H. Gilbert: 5 9 9, Napa Creek, Calistoga, Napa Co., Cal., May 31, 

 1897. 



This appears to have the broadest range of any North 

 American species, extending completely across the conti- 

 nent, and, according to Camerano, into South America. 



In the females the tail lobes may be either parallel or 

 divergent, so that they are probably opened and closed by 

 muscular action: while in the males of this genus and of 

 Gordius these lobes appear to be to great extent independ- 

 ent of such action. 



6. Chordodes occidentalis Montg. 



Coll. Univ. Cal.: ■3,9, Berkeley, Cal. Coll. Stanford Univ., collected by 

 C. H. Gilbert: 112 S $, 42 9 9, Napa Creek, Calistoga, Napa Co., Cal., 

 May 31, 1897. Coll. Cal. Acad. Sci.: 2 ??, 1 J, Hayvvards, Alameda 

 Co., Cal.; 1 9, Alameda Co., Cal.; 2 3 3,299, Santa Rosa Isl., Cal.; 

 4 9 9, Sierra el Taste, Baja Cal.; 1 9, St. Helena, Napa Co., Cal.; 1 9 

 Kings River, Fresno Co., Cal.; 1 <S , Lime Point, Marin Co., Cal.; 1 S, 

 San Miguel de Comondu, Baja Cal. ; 1 9,5 $ & , locality not marked, but 

 probably from California ; 1 9 , Battle Mountain, Nevada. 



A careful examination of this large number of specimens 

 shows that the Chordodes gordioides Montg. of my preced- 

 ing paper was based upon immature specimens of C. occi- 

 dentalis Montg., so that gordioides is not a tenable species. 



