MONOGRAPH OF WEST INDIAN STAPHYLINIDAE 41 



9. Second abdominal sternite present Oxytelinae 



Second abdominal sternite absent 10 



10. Antennae inserted along anterior margin of head 11 



Antenna inserted at sides of head near eyes Tachyporinae 



11. Intersegmented membranes with pattern of rectangular areas. Paederinae 

 Intersegmental membranes with pattern of longitudinal rows of variously 



shaped areas Staphyi.ininak 



Subfamily Piestinae 



As previously constituted this was a moderate-sized subfamily 

 of varied structure and appearance, which has been found to be dif- 

 ficult to define. Difficulties encountered during the study of the 

 West Indian species led to a paper recently published ^ in which 

 several of the subtribes of the Piestinae (Piestini of Bernhauer and 

 Schubert -) were transferred to the new subfamily Osoriinae. The 

 genus Cephaloxynum is here transferred to the subfamily Staphy- 

 lininae. Those changes leave the Piestinae with only two West 

 Indian genera, Piestus and Ilijpoteliis^ although other genera not 

 found there will probably also remain in the subfamily. These lat- 

 ter include Tngomiras^ Siagoniiim., Trigites {Pseudcleusis, Triga), 

 and perhaps others. This subfamily is thus greatly reduced in size, 

 while being made much more homogeneous through the removal of 

 extraneous elements. 



KEY TO WEST INDIAN GENERA OF PIESTINAE 



1. Head with regular impressed line between antennae; elytra 



striate II. Piestus 



Head without impressed lines ; elytra not striate I. Hypotelus 



I. Genus HYPOTELUS Erichson 



Hypotelus Ebichson, 1840, p. 840. 



Genotype. — ZT". pusillus Erichson (designated by Duponchel, 1841). 



Diagnosis. — Body slender, subdepressed, glabrous; head rounded 

 in front, not narrowed posteriorly; eyes small but prominent; an- 

 tennae longer than head and pronotum, basal segment (of male) 

 with a prominent tooth; mandibles small, unarmed; fourth segment 

 of the maxillary palpus at least twice as long as third; labium sub- 

 semicircular; labial pnlpi short, stout; pronotum quadrate, some- 

 what narrowed posteriorly ; prosternum not greatly elongate ; elytra 

 not extending much farther posteriorly than the metasternum, punc- 

 tate; abdomen margined; sternites of first and second segments not 

 present, 



iProc. D. S. Nat. Miis., vol. 92, pp. 7.")-n0, V^^2. 



* Coleopterorum cntalogus, purs 19, vol. :">, p. 4, 1910. 



■14000S— 42 4 



