1920] Chamberlin: Myriopod Fauna of Bermuda 275 



RHINOCRICID^. 



Rhinocricus monilicornis (Porath). 



Spirobolus monilicornis Porath, Bih. Svensk. vet.-Akad. Handl., 1876, 4, no. 7, 



p. 31. 

 Spirobolus heilprini Bellman, Proc. Acad. Sci., Phil., 1889, p. 127. 

 Spirobolus monilicornis Pocock, Ann. Mag. Nat. Hist., 1893, set. 6, 11, p. 123. 



This species appears to be well distributed in South America 

 and the West Indies and is obviously common on the Bermudas. 



Localities: Bermuda (Yale Exped., 1898); Hanging Bay 

 (O. Bryant, 27 June, 1903); Harrington Sound (R. W. Glaser) ; 

 Hungry Bay (A. E. Verrill, April, 1901). 



Rhinocricus ectus sp. nov. 



Black, each segment with a yellow or ferruginous annulus embracing 

 the caudal half of metazonite or but little more, though often widening 

 down the sides. Collum black, excepting a narrow, pale caudal border 

 on the former. Legs brick red. 



Sulcus across vertex distinct, widely interrupted in the frontal 

 region where the head is depressed, the median sulcus evident again 

 across lower part of clypeus. Antennae short; sensory cones numerous. 



Collum rounded below. Margined along anteroventral corner, 

 otherwise smooth and non-striate, or with but a single weak stria just 

 above caudal portion of margining one; exceeded by the second tergite, 

 which extends forward beneath it and bends down a little at anterior 

 edge; flattened beneath where alone it is striate. 



Segmental sulcus sharply impressed and distinct throughout. In 

 front of it always a second sulcus which is distinct entirely across 

 dorsum and ordinarily takes its origin a little above level of pore, where 

 it bends rectangularly back toward primary sulcus. Below it is a stria 

 which extends obliquely caudoventrad below pore, a series of other 

 similar fine oblique stries following below it. Pore just in front of the 

 primary sulcus which is gently curved opposite it. Metazonites strongly 

 striate below middle of sides, the series ending some distance below 

 level of pores. Scobina extending back to or near the thirty-fifth 

 somite. 



Anal tergite angulate behind, the angle caudally rounded; not 

 caudate, exceeded by the valves. Valves mesally protruding, but not 

 margined or so sharply elevated as in monilicornis. 



Ntmiber of segments, forty-four or forty-five. 



Length, 35 mm.-40 mm.; width, 3.5 mm.-4 mm. 



Locality: Bermuda (M. C. Z. coll.) 



The types of this species are two females. It appears to be 

 close to R. consociatus Pocock of Union Id., W. I,; but lack of 

 males of the present form and of specimens of consociatus for 

 comparison makes definite conclusions as to precise relationship 



