170 BULLETIN 18 2, UTsHTED STATES N'ATIONAL tSIUSEUM 



Another series of species from the West Indies, which are rather 

 similar to Lispinus but which key to Holotrochus^ are distinguished 

 from all the other Osoriini known to me ^° in lacking th.e trans- 

 verse sulcus on the anterior face of the front coxa. These form tlie 

 genus Paralispinus (Ancaeiis) which is transferred from the Lispini. 



I have seen seven specimens, including males and females of each 

 of the two species. 



KEY TO WEST INDIAN SPECIES OF HOLOTROCHUS 



1. Head and pronotum with ground sculpture 2. volvulus 



Head and pronotum without ground sculpture 1. poundi 



1. HOLOTROCHUS POUNDI, new species 



Description. — Rufopiceous. Head with very fine and sparse 

 punctures, which are generally without a discernible diameter, with- 

 out ground sculpture ; antennal segments 7 to 10 transverse. Pronotmn 

 two-fifths wider than long, two-fifths wider than head; parallel; 

 without lateral basal depressions; punctures irregular, sparse, denser 

 basally; without ground sculpture. Prostemum with raised poste- 

 rior margin enclosing a short carina on the posterior process. Elytra 

 one-ninth wider than pronotum, one-fourth wider than long; some- 

 what coriaceous, with a very few irregular punctures, rather indis- 

 tinct; without regular ground sculpture. Ahdovien with sparse tiny 

 muricate punctures and ground sculpture. Male^ eighth sternite 

 rather strongly narrowly lobed; ninth narrowly lanceolate; lateral 

 plates longitudinally elevated to prominent spinelike apex; ninth 

 tergite narrowly truncate, angles toothed. Female^ eighth sternite a 

 little more broadly lobed than in male; ninth sternite not present; 

 lateral plates smaller than in male but similar; ninth tergite a little 

 more broadly truncate than in male. Length, 4 mm. 



Type locality. — Trinidad, 5 miles west-southwest of Manzanilla 

 junction, on the Plum Road, county of St. Andrew, ward of Tunire. 



Types. — Holotype, male, and one paratype, U.S.N.M. No. 52379, 

 collected by me on December 18, 1935, 



Records. — The following is the only record known to me: 



Trinidad: Manzanilla (Blackwelder station 104B). 



Specimens examined. — I have seen only the two types. 



Remarks. — This species is readily distinguishable by the absence 

 of ground sculpture. The development of the prosternal elevation 

 is much less ])ronounced than in volvulus but seems to be derived 

 in the same manner. 



Th(vse specimens were collected from a very rotten log. 



'*• I have examined In this connection Cylindropsis, Mlmoyomis, Ouloglene, Oryssomma, 

 Holotrochua, Osorius, and the new genus Neotrochus. 



