THE CANCROID CRABS OF AMERICA 559 



Description. — Front prominent, well advanced beyond the rounded, 

 inner supra-orbital angle, cut into two well marked lobes, each of 

 which has the inner angle dentiform and outer angle rounded. Tooth 

 at lower inner angle of orbit with spiniform tip turned inward; outer 

 angle of orbit acute. Lateral epibranchial angle marked with a 

 sharp spine. Upper border of palm blunt, lower border acute; outer 

 surface covered with a short down easily rubbed off. 



Color. — A grayish or reddish 3'ellow spotted above and below rather 

 coarsely with small, rounded, deep-red spots. (Dana.) 



Measurements. — Male (29486), total length of carapace 12, \vidth 

 of same 13.5, fronto-orbital width 12.4, interorbital width 7.3, width 

 of front between antennae 5.5 mm. 



Range.— From the Red Sea eastward through the Indo-Pacific 

 region to the Hawaiian Islands and the west coast of Mexico (Stimp- 

 son). 



Material examined. — No American material has been seen by the 

 writer. The subspecies was reported by Stimpson from Socorro 

 Island, Revilla Gigedo Islands, Mexico. 



TRAPEZIA DIGITAUS LatreiUe 



Plate 228, Figures 5 and 6 



Trapezia digitalis Latreille, Encyc. Meth., Hist. Nat., Entom., vol. 10, 1825, 

 p. 696 (type-locality, Red Sea; type not extant). 



Trapezia corallina Gerstaecker, Arch. f. Naturg., vol. 22, pt. 1, 1856 (1857), 

 p. 126 (type-locality, Veragua; tj'pe in Berlin Mus.). 



Trapezia nigro-fusca Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1860, 

 p. 219 [91] (type-locality. Cape St. Lucas; type not extant). 



Trapezia formosa Smith, Proc. Boston Soc. Nat. Hist., vol. 12, 1869, p. 286 (type- 

 locality, Pearl Islands, Bay of Panama; cotypes in M.C.Z.).— A. Mii.ne 

 Edwards, Crust. Reg. Mex., 1880, p. 343, pi. 58, fig. 1-16. 



Diagnosis. — Antero-lateral margins parallel; lateral projection lack- 

 ing or a shght tooth in the full grown. Front finely denticulate, 

 lobes obscure. 



Description. — Surface smooth and burnished. Carapace w^th a 

 much broader look than the preceding owing to the somewhat lesser 

 prominence of the front and the greater convergence of the postero- 

 lateral borders. Antero-lateral margins subparallel. Front slightly 

 notched in the middle line and separated from the scarcely denti- 

 form supra-orbital angles by a shallow notch; it is thus obscurely 

 divided into two lobes each of which has the free edge finely and 

 irregularly denticulate. Outer angle of orbit acute and also the 

 inner angle of the lower margin. Lateral margins either entire or 

 with a slight notch, but no spine except in the very young. 



Chehpeds subequal in both sexes. Arm short, broader than long, 

 its foliaceous anterior border dentate or crenate; inner angle of wrist 

 acute; upper border of hand rounded, lower border acute. Legs 

 smooth, except the dactyls. 



