304 BULLETIN 182, UNITED STATES NATIONAL MUSEUM 



5. RUGILUS CHTHONUS, new species 



Descriptimi. — Piceocastaneous, shinmg. Head one-ninth wider 

 than long, not rounded behind although hind angles are broadly 

 rounded; eyes large, at about their length from base; labrum with tAvo 

 large slender but blunt denticles, lateral angles slightly dentate; uni- 

 bilicate punctures rather large, often elongate; vertex with an indefi- 

 nite median smooth area; without groimd scul))ture except vaguely 

 in bottom of punctures. Pronotum one-eightli longer than wide, three- 

 fourths as wide as head; widest at anterior angles, sides distinctly 

 emarginate in front, distinctly arcuate to base; with distinct elevated 

 smooth midline, moderately large and strongh' umbilicate punctures 

 dense on either side but leaving an indefinite smooth area on each side 

 behind middle; without ground sculpture. Elytra as long as wide, 

 scarcely wider than head; conjointly emarginate behind; punctures 

 rather coarse and deep, separated by convex intervals ; without ground 

 sculi)ture. Ahdomen w^ith dense fine punctures much obscured bj' dense 

 and rather indistinct ground scidpture. Male^ unknown. Female, 

 eighth sternite prominently rounded. Length 5I/2 mm. 



TT/pe locality. — Puerto Rico, 5 miles north of Villalba. 



Types. — Holotype, female, U.S.N.M. No. 52410, collected l)y me on 

 October 12, 1935.* 



Records. — The following are the records known to me: 



Hispaniola: Haiti, Furcy (Mann, in M.C.Z.). LaVisit6 (Dai'lingt(»u. in M.C.Z. 



and U.S.N.M.), Deshaniere (Darlington, in M.C.Z. aiul U.S.N.M.). 

 Puerto Bico: Villalba ( Blackwelder station 64). 



Specwiens examined. — I have seen only the type and five examples 

 from the JMuseum of Com})arative Zoology. 



Remarks. — This species is distinct from all others now known from 

 the West Indies by the irregular smooth spaces of the pronotum and 

 by its size. 



As the specimens from Hispaniola differ slightly from the type, 

 they are not made paraty})es. They have the punctures of the head 

 less united and not appearing to be arranged in arcs; they do not have 

 the pronotal punctures near the midline posteriorly quite so crowded ; 

 and thej^ have the lateral smooth areas smaller, scarcely more than 

 enlarged intervals. 



The type was collected by sifting dead leaves and trash in a damp 

 gully. All examples were taken at elevations of 3.000 lo 7,000 feet. 



6. RUGILUS INSULARIS (Cameron) 



StilicHS hisularix Camekon, 1913b. p. 341. — Leng and Mutchlek, 1917. p. 198. — 

 ScHEEKPEivrz, 1933, p. 1242. — Bl^ckwI'Xder, 1939a, p. 107., 



Desc7iptiof}. — Black, shining, elytra sometimes narrowly and indis- 

 tinctly paler along apical mai-gin. IJeod one-seventh wider than long, 



