G64 



ME. E. J. MIEES OS THE 



This genus is only known to me from M. A. Milne-Edward s's 

 figure in the ' Mission Scientif. Mexique ' (pi. xvii. fig. 5), from 

 which the diagnosis is taken. Its nearest ally among the Perice- 

 rinae seems to be Scyra, Dana. If the orbits are incomplete, it 

 would probably be placed among the Epialtinse. It agrees, how- 

 ever, with most of the Periceridae in having a short epistome. 



** Basal joint of aniennce often very much enlarged, with one or 

 more spines at its distal extremity. 



t Carapace narrow and elongated, nearly vertically dcfiexed in front 

 of gastric region. 



CrPHOCAECiNUS, A. M.-JEdivards. Spines of rostrum slender 

 and divergent. Spine of basal anteunal joint small. Type Cyfho- 

 carcinus minutus, A. M.-Edwards. 



tt Carapace siiltriangular, not deflexed in front. 



1. Spine at antero-cxternal angle of antennal joint very short, 

 and not visible from alove. 



TiAEiNiA, Dana. Carapace tuberculated, without a distinct 

 series of lateral spines. Spines of rostrum very slender and con- 

 tiguous. Interorbital space broad. Anterior legs in male with 

 the palm short; fingers gaping. Ambulatory legs nodose or 

 spinose. Type Tiarinia cornigera (Latreille). 



TYL0CAECI^^rus,'*Ji^er5 {tvXos, a Tcnoh). Carapace tuberculated, 

 without lateral spines. Spines of rostrum slender, divergent. 

 Interorbital space narrow. Basal antennal joint not much en- 

 larged. Anterior legs in male with the fingers nearly meeting 

 when closed. Ambulatory legs spinose or nodose. Type Tylocar- 

 cinus styx (Herbst). 



Peeiceea, Latreille. (Plate XIII. figs. 4, 5.) Carapace with 

 a series of lateral spines. Spines of rostrum long and divergent. 

 Interorbital space broad. Basal joint of antennae very much en- 

 larged, with two small distant spines at its distal end. Anterior 

 legs long, palm slender and elongated, fingers not gaping. Am- 

 bulatory legs smooth. Type Fericera cornuta, Latreille. 



2. Spine at antero-external angle of basal antennal joint very long, 

 and visible from above. 

 MiCEOPHETS, Milne-Edwards {Milnia, Stimpson; Perinea, 



