Mithrax (Mithrax) pygmaeus Be\l 364 



Mithrax (Mithrax) spinipes (Bell) 366 



Mithrax (Mithrax) belli Gerstaecker 368 



Subgenus Mithraculus White 372 



Mithrax (Mithraculus) denticulatus Bell 372 



Mithrax (Mithraculus) nodosus Bell 376 



Genus Teleophrys Stimpson 378 



Teleophrys cristulipes Stimpson 379 



Teleophrys tumidus (Cano) 383 



Genus Microphrys Milne Edwards 385 



Microphrys iveddelli Milne Edwards 387 



Microphrys aculeatus (Bell) . . 389 



Microphrys platysoma (Stimpson) 392 



Microphrys triangulatus (Lockington) 395 



Microphrys branchialis Rathbun 398 



Genus Stenocionops Desmarest 401 



Stenocionops angusta (Lockington), n. comb 402 



Stenocionops ovata (Bell) 405 



Stenocionops beebei Glassell 409 



Genus Macrocoeloma Miers 412 



Macrocoeloma maccullochae Garth 413 



Macrocoeloma heptacanthum (Bell) 415 



Macrocoeloma villosum (Bell) 416 



Genus Hemus A. Milne Edwards 419 



Hemus analogus Rathbun 420 



Hemus finneganae, n. sp 422 



Genus Thoe Bell 425 



Thoe erosaBeW 426 



Thoe sulcata sulcata Stimpson 427 



Thoe sulcata panamensis Nobili 430 



Family PARTHENOPIDAE 432 



Subfamily Parthenopinae 433 



Genus Parthenope Weber 434 



Subgenus Parthenope Weber 436 



Parthenope (Parthenope) hyponca (Stimpson) .... 436 



Subgenus Platylambrus Stimpson 438 



Parthenope (Platylambrus) exilipes (Rathbun) . . . . 439 



Parthenope (Platylambrus) depressiuscula (Stimpson) . . 442 



Subgenus Pseudolambrus Paulson 444 



Parthenope (Pseudolambrus) triangula (Stimpson) ,. . . 444 



Parthenope (Pseudolambrus) exewvata (Stimpson) .. . . 446 



Parthenope (Pseudolambrus) stimpsoni, n.sp 448 



Genus Thyrolambrus Rathbun 451 



Thyrolambrus glasselli, new name . . 452 



XI 



