MONOGRAPH OF WEST INDIAN STAPHYLINIDAE 493 



LXXX. Genus LEPTACINUS Erichson 



Lcptacinus Erichson, 1839a, p. 429. 



Xanthophius Motschulsky, ]S.j9, p. 75. 



Xanthophyus Gemmincer and Harold, 1868, p. 607 (emendatiou). 



Leptacinodes Casey, 1906, p. 3,69. 



Lepiacinius Wolcott, 1936, p. 45. 



Genotypes. — Leptacinus hrevicornis (Erichson) (designated by Du- 

 ponchel, 1841). Of Xanthophius, X. serpentarius Motschulsky 

 (monobasic) ; of Leptacinodes., StaphyUnus hatychrus Gyllenhal = 

 Leptacinus hatychims {Gy\\^\\\\?i\) = Leptacinodes hatychrii^ (Gryl- 

 lenhal) (original designation). 



Diagnosis. — Head and pronotum sparsely punctate; antennal 

 grooves distinct; ocular grooves rather irregularly impressed; an- 

 tennae inserted close together at front of head, basal segment about 

 one-third as long as head, outer segments densely pubescent from 

 fourth joint; labrum small, rather deeply emarginate; maxillary pal- 

 pus short, fourth segment conical, slightly shorter than third; last 

 segment of labial palpus slender; gular sutures united; neck about 

 one-third as wide as head; pronotum with lateral margin double, the 

 lines separate throughout; prosternum with a pair of large sclerites 

 in front of sternite; elytral suture beveled; middle coxae moderately 

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

 abdominal sternites absent (except possibly for a small lateral rem- 

 nant of the second) ; intersegmental membranes of abdomen m.arked 

 with a pattern of angular areas in longitudinal bands. 



Remarks. — This genus is distinguished principally by the structure 

 of the maxillary palpi. It is represented in the West Indies by two 

 species, of which only one is represented in my material. 



KEY TO WEST INDIAN SPECIES OF LEPTACINUS 



1. Head black, pronotum rufous, elytra and abdomen piceocastaneous, with 



outer apical diagonal half of elytra luteous 2. paruinpunctatus 



Rufotestaceous, apex of elytra nigrescent 1. eggersi 



1. LEPTACINUS EGGERSI Bernhauer and Schubert 



Leptacinus apicipennis Bernhauek, 1904b, p. 234. — Beenhaiter and Schubert, 

 1914, p. 293. — Leng and Mutchler, 1914, p. 406. (Not Fairmaire and 

 Germain, 1861.) 



Leptacinus eggersi Bernhauer and Schubert, 1914, p. 293. — Leng and Mutchlee, 

 1914, p. 406. 



Description. — (From Bernhauer.) Rufotestaceous, apex of elytra 

 nigrescent. Head much longer than wide, strongly widened behind; 

 antennae strongly incrassate; finely and sparsely punctate except 

 along the middle. Pronotum one-half longer than wide, somewhat 

 narrower than elytra, somewhat narrowed behind ; dorsal series with 

 7 to 9 punctures; laterally finely and sparsely irregularly punctate. 



