162 BULLETIN 18 2, UNITED STATES NATIONAL MUSEUM 



Oil the disk; with distinct pseudo-scaly ground sculpture. Length, 

 3 to 31/2 mm. 



Type locality. — Puerto Rico, El Yunque, elevation about 3,000 feet. 



Types. — Holotype and five paratypes in the Museum of Compara- 

 tive Zoology; five paratypes in the United States National Museum 

 (No. 52537) ; collected by Dr. P. J. Darlington in May 1938. 



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



Puerto Bico: El Yunque (Darlington, in M.C.Z. and U.S.N.M.). 



Specimens examined. — I have seen only the 11 types. 



Remarhs. — This species is quite distinct from all others by its 

 distinct punctures. It seems to be a true P avails pinu-s, however, by 

 all structural characters. I have received no record of its habits. 



XXI. Genus LEPTOCHIRUS Germar 



Leptochirus Germar, 1824, p. 35. 

 Leptochcinis Stephens, 1829, p. 297 (misspelling). 

 Subgenus Mesochiriis Bkrnhauer, 1903, p. 120. 

 Subgenus Strotigi/lochh-ns Bernhaueb, 1903, p. 120. 

 Subgenus Tropiochirus Bernhauer, 1903, p. 120. 



Genotypes. — L. scorlaceud Germar (monobasic). Of Mesochirus, 

 Leptochirus (Mesochirus) mxixillosus (Fabricius) (designated here) ; 

 of Strongyloahirus, Leptochirus {Strongylochirus) laevis Ltiporte 

 (designated here) ; of Tropiochims, Leptochirus {Tropiochirus) 

 proteus Fauvel (designated here). 



Diagnosis. — Head subquadrate; galar sutures confluent behind the 

 gular pits; antennae not longer than the head and pronotum; man- 

 dibles multidentate; all palpi filiform; pronotum quadrate; anterior 

 coxal cavities small and posterior, separated by a conspicuous process 

 of the prosternum and closed behind by the ventral extensions of the 

 posterior margin of the pronotum ; anterior coxae globose, not promi- 

 nent; processes of the mesosternum and the metasternum meeting 

 midway between the middle coxal ca\nties; abdomen not margined 

 (entirely without paratergites), cylindrical; sternites of first and 

 second segments not present ; anterior tibiae serrate ; posterior coxae 

 "transverse" (feebly expanded laterally and caudally under the 

 femora). 



Remarks. — This is one of the six genera reported from Trinidad 

 (and South America) but not from the true West Indies. Our single 

 species belongs to the subgenus Mesochirv^s of Bernhauer, which is 

 characterized by having the prosternum prolonged between the front 

 coxae in a process at most as wide as long, and having the clypeal 

 area at an abrupt angle with the vertex and set off by the projecting 

 margin of the latter. 



