PUERTO RICAN MORDELLISTENA — RAY 393 



oblique ridges. Anal style almost three times as long as apical 

 ventral segment, attenuate to apex. 



The abdominal segments of the female (except anal style) lack the 

 fuscous coloration of the male, and the general castaneous color is 

 lighter. The prothorax and the elytra are narrower than in the male. 



Type locality. — Villalba, Puerto Rico. 



T^/pe.— Male, U.S.N.M. no. 51599. 



Remarks. — Both the type and allotype were collected at Villalba 

 on June 21, 1934, by C. M. Matos. This species is dedicated to 

 Prof. S. T. Danforth for his kindness in permitting the writer to 

 study his collection of Puerto Rican Mordellidae. 



MORDELLISTENA HUMERALIS, new species 



Figure 28, a 



This species may be separated from its closest ally militaris 

 LeConte (1862, p. 49), by the bicolored antennae and ventral abdom- 

 inal segments and by the broader terminal segment of the maxillary 

 palpi. 



Length: 2.6 mm; including anal style, 3.8 mm. Elongate, subpar- 

 allel; derm generally black, with the following exceptions: Clypeus 

 and front narrowly, humeri of elytra broadly, inner edge of this spot 

 diagonal, almost reacliing suture, extending nearly one-half entire 

 length, flavocastaneous ; antennae with three basal segments and 

 extreme apex of succeeding segments, maxillary palpi, and legs, 

 flavous; medioanterior part of metasternum, basal abdomuial segment 

 wholly, and apical margins of succeeding segments, piceocastaneous. 

 Body densely covered with fine recumbent pubescence, cinereous 

 dorsally, whitish ventrally. 



Antennae 0.6 mm long, reaching base of abdomen; segment 4 one- 

 third longer than 3; 5-10 each as long as 3 and 4 combined and each 

 broader; 11 rounded, but httle broader than 10. Terminal segment 

 of maxillary palpi enlarged, broadly triangular. Pronotum but slightly 

 broader than long (0.75 by 0.67 mm), convex, sides finely margined, 

 basal angles obtuse, midbasal lobe rounded, one-thii-d width of pro- 

 notum. Scutellum small, subtriangular. Elytra almost two and one- 

 half times as long as broad (1.95 by 0.8 mm), sides paraUel for four- 

 fifths their length, then rounded to suture. Hind tibiae with two 

 obhque, equal ridges extending halfway across outer face; basitarsi 

 with three, second segment with two ridges. Anal style two and two- 

 thirds as long as apical ventral segment, attenuate to apex. 



Type locality. — Villalba, Puerto Rico. 



Type.— Male, U.S.N.M. no. 51600. 



Remarks. — The single specimen at hand was collected at Villalba 

 on June 21, 1934, by C. M. Matos. 



