302 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 87 



proximal, median one broad, the sides forming a right angle (fig. 

 18, ^). Anal style more than three times as long as apical ventral 

 segment, narrow, attenuate to apex. 



Type locality. — Paraiso, Canal Zone, Panama. 



Tyj)e.—M.2\^ : U.S.N.M. No. 52916. 



Remarks. — The type was taken at Paraiso, Canal Zone, Panama, 

 January 17, 1911 (E. A. Schwarz), the allotype at Pedro Miguel, 

 Canal Zone, Panama, April 17, 1911 (A. H. Jennings) ; and a male 

 paratype at Palo Seco, Trinidad, October 20, 1918 (H. Morrison). 



The two long ridges of the posterior tibiae in this species is the 

 first record of such an occurrence in any member of the family and 

 this character alone will separate ornatiperwiis from any species re- 

 corded in the "Biologia." The castaneous humeral spot is variable 

 in size and in the paratype extends the length of the elytra, leaving 

 only a narrow, piceous, sutural and marginal line. 



MORDELLISTENA GRACILIFORMIS, new species 



This species is mostly closely alKed to ^-fa^sciata Champion (1891, 

 p. 337) , a Mexican form, but may easily be separated from the latter 

 member of the genus by the completely black dermal color, the 

 smaller, more irregular pubescent patches on the pronotum and ely- 

 tra, and by the shorter distal segment of the maxillary palpi. 



Length: 2.75 mm.; including anal style, 3.65 mm. Elongate, sub- 

 parallel ; dermal color entirely black. Surface densely covered with 

 fine, yellowish- white pubescence, dense on pronotum and elytra, where 

 it forms a number of irregular, broken, transverse fasciae. 



Antennae 1 mm. long, reaching basal abdominal segment ; segment 

 4 equal in length to 3, but slightly broader; 5-10 each one-half 

 longer than 4 and considerably broadened; 11 rounded, but little 

 longer than 10. Distal segment of m.axillary palpi enlarged, broadly 

 triangular, rounded on mesal edge and apex. Prothorax slightly 

 broader than long (0.8 by 0.75 mm.), sides rounded, base arcuate, 

 midbasal lobe short, subtruncate. Scutellum small, triangular, apical 

 angle rounded. Elytra twice as long as broad (2 by 1 mm.), sides 

 gradually narrowing from broadest posthumeral position to apex, 

 apices individually rounded. Tarsal claws with three teeth, all short, 

 blunt, proximal one situated medially. Posterior tibiae with two 

 oblique ridges extending halfway across outer surface ; basitarsi with 

 three, second segment witli two oblique ridges, all extending halfway 

 across outer surface. Anal style three times as long as apical ventral 

 segment (0.9 by 0.3 mm.), narrow, attenuate to apex, sides straight; 

 last ventral segment but twice length of penultimate one. 



Tyj)e locality.— Coliseo, Cuba. 



Ti/pe.—Male, U.S.N.M. No. 52917. 



