198 bulletin: museum of comparative zoology. 



124, Rhinocricus barbouri, sp. nov. 



Type — M.C.Z. 4,383. Isle of Pines: Sierra de Caballos. T. 

 Barbour. 



A large species much suggesting in size, coloration, arrangement, and 

 form of scobina R. duvcnwyi of Cuba. It is similarly very dark, 

 almost blackish brown with the caudal borders deepest. The anal 

 valves and scutum are concolorous instead of being abruptly and 

 obviously lighter excepting the dark tip as in specimens of R. duvenwyi 

 studied. The new form is at once separated from the Cuban species 

 by its strongly marked sculpturing, giving it a rougher, less shining 

 appearance, and especially by the presence of a second deep suture in 

 front of the ordinary one. The lateral ends of the coUum are narrower. 

 Also the collum shows a deep transverse sulcus in front of the caudal 

 margin, this curving forward below on each side to middle of plate. 

 The head shows on the lower part of the frons a conspicuous depres- 

 sion from the edges of which radiate short impressed lines. The 

 apical portion of the anal scutum is depressed and more strongly set 

 off from the basal part and at the same time is more roughened than 

 in R. duvernoyi. 



Number of segments, fifty-two. 



Length near 142 mm. ; width, 14.5 mm. 



125. Rhinocricus thomasianus, sp. nov. 



Type — M. C. Z. 4,384. d". St. Thomas. Hassler Exped. 



Similar in size and in having a second segmental suture in front of 

 the first one to R. barbovri. From that species readily distinguished 

 in the much smoother surface. It lacks the transverse sulcus on the 

 collum present in R. barbouri though presenting in front of the posi- 

 tion of the latter on each side a wider shallow transverse depression. 

 The collum is more broadly rounded below at each lateral end; dis- 

 tinctly margined laterally and for a short distance inferiorly in front. 

 Lacking the pit-like depression on the front of the head present in 

 R. barbovri. The tip of the anal scutum, obviously exceeded by 

 the anal valves, is not abruptly depressed or set off from the proximal 

 region. Scobina extending to within a few segments of caudal end, 

 thus differing from R. barbovri; very deep. The general color of 

 the type at present is light brown; the caudal margin of segments 



