MONOGRAPH OF WEST I.VDL\X STAPHYLINIDAE 395 



11. Fourth segment of maxillary palpus large, fusiform 12 



Fuurtli segment of maxillary palpus large near base but becoming very slender 

 apically LXVI. Erichsonius 



12. Pronotum with impunctate median area and dense punctures at sides. 



LXV. Cafius 

 Pronotum virtually impunctate except for distinct series of punctures. 



LXIII. Philonthus 



13. Antennae strongly geniculate LXXV, Acylophorus 



Aniennae not geniculate 14 



14. Tarsi 5-4-4 LXXVI. Atanygnathus 



Tarsi 5-5-5 LXXIV. Heterothops 



LXII. Genus PAEDEROMIMUS Sharp 



Pacderomimus Sh.vep, 1885, p. 439. 



Genotype. — P. cliff ormiceps Sharp (at least implied by Sharp, and, 

 if necessaiy, fixed here). 



Diagnosis. — Head without dense umbilicate punctures, not margined 

 beneath the eyes; antennae widely separated at front of head, outer 

 segments densely pubescent from the fourth joint; labrum bilobed; 

 palpi elongate and slender, fourth segment of maxillary longer than 

 third, labial similar to maxillary; gular sutures united behind middle; 

 lateral margin of pronotum double, lines united near the coxae; an- 

 terior coxal cavities entirely open behind ; front coxae large, exserted ; 

 posterior coxae contiguous, "triangular" ; first and second abdominal 

 sternites absent; intersegmental membranes of abdomen with pattern 

 of irregular rounded sclerotized areas arranged in longitudinal bands ; 

 iemora unarmed. 



Remarks. — This genus was established by Sharp for species formerly 

 of the genus Philonthus but having the prosternum transversely di- 

 vided into two regions of different texture and having the side pieces 

 of tlie pronotum not inflexed. It is a large genus confined to tropical 

 or subtropical America. 



I have seen 33 examples of this genus from the West Indies. I 

 assign these to four species, of which one appears to be new. 



KEY TO WEST INDIAN SPECIES OF PAEDEROMIMUS 



1. Abdomen rufotestaceous, segments six to seven piceous 2. cribricollis 



Abdomen at most with eighth segment testaceous 2 



2. Ei;,'hth tergite and sometimes posterior border of ninth rufotestaceous. 



3. interjectus 

 Abdomen entirely ijiceous or black 3 



3. Dorsal pronotal series of six punctures 4. lustralis 



Dorsal pronotal series of four punctures 1. tetricus 



1. PAEDEROMIMUS TETRICUS, new species 



Description. — Rufopiceous. Head quadrate with angles rounded; 

 eyes separated from base by one-third more than their length ; in front 



