chamberlin: west Indian chilopoda and diplopoda. 211 



similarly narrowed laterally but the lower corners in the male are dis- 

 tinctly more angular, the posterior one in particular being acute and 

 somewhat produced caudad. The processes of the sternites in the 

 male are similar, the fifth one bearing the two conspicuous, corneous 

 lobes projecting forward over the fourth, but the sixth sternite ob- 

 viously lower, not at all lobate or elevated into prominences. 



Number of segments, fifty. 



Length up to about 54 mm. ; width to 3.6 mm. 



148. Trigoniulus lumbricinus (Gerstaecker). 



Spirobolus lumbricinus Gerst., Gliederthier-fauna Sansibar, 1873, p. 516. 

 Spirobolus goesi Porath, Bih. Svensk. vet.-akad. Handl., 1876, 4, no. 7, p. 36.^ 

 Spirobolus dominicae Pocock, Ann. mag. nat. hist., 1888, ser. 6, 2, p. 481-483, 



pi. 16, f. 7.2 

 Spirobolus sanctae-luciae Bollman, Proc. U. S. X. M., 1888, 11, p. 214.^ 



Habitat. — Haiti:- Port au Prince, Grand Riviere, Diquini, Petion- 

 ^^lle, Emery. (W. M. Mann). Porto Rico: Rio Piedras. (R. T. 

 Cotton). St. Bartholomew.^ Dominica.- St. Lucia.* TrinIdad: 

 Esperanza Sugar Estate, December, 1912. R. Thaxter. 



148a. Trigoniulus frater, sp. nov. 



Type.— M. C. Z. 4,445. Tobago: near Richmond Bay. H. L. 

 Clark. 



A decidedly smaller species than T. lumbricinus from which it differs 

 also conspicuously in color. A typical somite is encircled with a broad 

 dark brown to blackish band in front as well as caudad of which 

 there is a border of flavous or light brown color then becoming dilute 

 ferruginous in the anterior region. The dark band narrows ventrad 

 and above in the anterior part of body especially embraces light 

 areas. Anal scutum and valves dark brown or blackish. Legs light 

 ferruginous. 



The lower wing of the coUum on each side broader than in any one 

 of the other species, not incurved on the caudal side; the margin 

 elevated on each side and up the front well toward the dorsum; a 

 strong longitudinal sulcus a little above the inferior end of the plate. 



The surface of the somites obviously smoother than in the two 

 species mentioned, lacking wholly or nearly so the characteristic 

 circular and crescentic impressions. 



