394 BULLETIN 18 2, UNITED STATES NATIONAL MUSEUM 



tlie Xanthopygina, and the Qiiediina. For convenience the genera 

 of the three last subtribes are arranged in a single key to the tribe. 



KEY TO TRIBES OF STAPHYLININAE 



1. Bases of antennae approximate; prosternum with a pair of sclerites in front 



of tlie steruite Xantiiounini 



Bases of antennae distant; prosternum without anterior sclerites. 



Staphyt>inini 



Certain genera that have been placed in the Xantliolinini are 

 Jierein transferred to the Staphyliniiii. It is possible that a new 

 subtribe will have to be erected for them there, but they certainly 

 have nothing to do with the Xantliolinini. These are Diochm and 

 Holisus (both of thoni having been previously transferred by certain 

 writers). To these I now add Cephdloxinnim, ])ro})()sed by Bern- 

 liauer in the Piestini but surely a member of this group closely 

 related to Holisus. Both of the characters used above will distin- 

 guish these and all other Staphylinini from all Xantholinini, so far 

 .as known to me. 



KEY TO WEST INDIAN GENERA OF STAPHYLININI 



1. Lateral margin of pronotiun double 2 



Lateral margin of pronolum simple 13 



; 2. Fourth segment of maxillary palpus much shorter and more slender 



than third 3 



Fourtli segment of maxillary palpus nearly equal to or longer than 

 third 5 



3. Lahrum large, prominent at middle LXXI. Diochus 



Lahrum bilobed 4 



4. Side of pronotum with two marginal lines not uniting anteriorly. 



LXXII. Cephaloxynuta 

 Side of pronotum with three marginal linos uniting before anterior angle. 



LXXIII. Holisus 



"5. Marginal Jines of pronotum separate 6 



Marginal lines of pronotum united near apex 8 



■6. Head margined beneath the eyes 7 



Head not margined beneath the eyes LXVIII. Creophilus 



■ 7. Upper lateral line of pronotum extended around front angles and then united 



to lower LXX. Piiilothalpus 



Upper lateral line of pronotum not extended around front angles. 



LXIX. Xanthopyg'us 



8. Posterior femora with two rows of spines l>eneath ; gular sutures united in 



front LXIV. Belonuchus 



Posterior femora at most with one row of spines; gular sutures generally 

 imitod only basally 9 



9. Side piece of pronotum infloxed (or head margined beneath eyes) 10 



Side piece of pronotum not indexed ; head not at all margined beneath 



eyes LXII. Paederomimus 



:;10. Head and pronotum with dense umbilicate punctures__ LXVH. Staphylinus 

 Head and pronotum not densely umbilicately punctate 11 



