202 bulletin: museum of comparative zoology. 



132. Rhinocricus grammostictus Pocock. 

 Journ. Linn. soc. London, 1894, 24, p. 501.' 

 Habitat. — St. Lucia (G. A. Ramage).^ 



132a. Rhinocricus mimeticus, sp. no v. 



Type.— M. C. Z. 4,404. Tobago: near Plymouth, April, 1916. 

 H. L. Clark. 



Like R. vincenti in ha^^ng two sutures of which the posterior one is 

 obsolete across the dorsum but easily distinguished from that species 

 in ha\dng the anal scutum surpassing the valves. In coloration sug- 

 gesting R. monilicornis. On each ordinary somite there is a dark 

 encircling stripe just in front of the posterior suture, this band narrow- 

 ing down each side and ending some distance from the legs. Dorsally, 

 there is a narrow, dark stripe in front of the caudal border, and on 

 some segments, especially in posterior region, a dark caudal mark 

 below the level of the pore. The collum is dark, narrowly margined 

 "wath pale. Head dark. Anal valves dark. The anal scutum dark 

 proximally, becoming lighter, flavoferruginous distally. Legs ferru- 

 ginous. 



Collum weakly margined below and a short distance up the front. 

 Widely rounded below. Much surpassed ventrally by the second 

 tergite. 



Posterior suture conspicuously angled at level of pore. Anterior 

 suture in anterior region arising below pore, elsewhere near its level, 

 sharply defined throughout its length, the posterior one obsolete 

 dorsally. 



Anal scutum conspicuously produced, exceeding the valves, distally 

 strongly rounded. Anal valves mesally elevated and compressed, 

 but without margining sulci. 



Number of segments, forty-seven. 



Length, near 34 mm. ; width, 2.6 mm. 



133. Rhinocricus vincenti Pocock. 

 Journ. Linn. soc. London, 1894, 24, p. 503, pi. 38, f. lO.i 

 Habitat.— St. Vincent (H. H. Smith) .^ 



