390 PROCEEDINGS OF THE NATIONAL MUSEUM vol. S4 



3. Ventral surface, including legs, entirely unicolorous; total length 



not more than 2.5 mm 4 



Ventral surface bicolorous, abdomen annulate with alternate 



castaneous and fuscous bands annuliventris Quedenfeldt 



4. Five basal segments of antennae flavous, rest black; head, 



thorax, and ventral thoracic segments piceous. angustiformis, new species 

 Entire body surface flavous ferruginea (Fabricius) 



5. Distal segment of maxillary palpi triangular (fig. 28, d-f) 6 



Distal segment of maxillary palpi club-shaped (fig. 28, g) . 



varietas, new species 



6. Hind basitarsus with three oblique ridges (fig. 28, c) 7 



Hind basitarsus with two oblique ridges (fig. 28, h). 



signaticoUis Quedenfeldt 



7. Elytra less than three times as long as broad.. 8 



Elytra more than three times as long as broad tnarginicollis Maklin 



8. Antennal segments 3 and 4 equal in length, segments 4 and 11 



black, extreme apices ridged with flavous danforthi, new species 



Antennal segment 4 distinctly longer than 3, segments 4-11 



entirely fuscous humeralis, new species 



9. Second segment of hind tarsus with one ridge (fig. 28, h) 10 



Second segment of hind tarsus with two ridges (fig. 28, c) 11 



10. Segments 5-10 of antennae each as long as 3 and 4 together, 



segment 11 one-fourth longer than 10 lineata, new species 



Segments 5-10 of antennae each no longer than 4 alone, seg- 

 ment 11 almost twice as long as 10 barberi, new species 



11. Anterior tibiae slender 12 



Anterior tibiae with a knifelike form (fig. 28, h) leal, new species 



12. Base of elytra with a Y-shaped spot surrounding scutellum (fig. 



28, Z); elytra almost three times as long as broad. .y-nigrum, new species 

 Elytra lacking Y-shaped scutellar spot; elytra less than two 



and one-half times as long as broad 13 



13. Distal segment of maxillary palpus with concave outer margin; 



basitarsus of hind legs with two oblique ridges (fig. 28, h). 



lucidovirga, new species 

 Distal segment of maxillary palpus with straight outer margin 

 (fig. 28, e); basitarsus of hind legs with three oblique ridges 

 (fig. 28, c) ephippium, new species 



MORDELLISTENA ANNUUVENTRIS Quedenfeldt 



Mordellistena annuliventris Qvedenfeldt, Berliner Ent. Zeitschr., vol. 30, p. 126, 

 1886. 



One specimen: Aibonito, Puerto Rico, July 23, 1934 (R. G. Oakley). 



MORDELLISTENA ANGUSTIFORMIS, new species 



Figure 28, b 



This species may be separated from signaticoUis Quedenfeldt (1886, 

 p. 125) by the black derm of the head and thorax, the absence of a 

 black marginal line on the elytra, and the single oblique ridge on the 

 second segment of liind tarsi. 



Length: 1.85 mm; including anal style, 2.45 mm. Elongate, 

 subparallel. Derm generally black; elytra castaneous with a narrow, 



