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Show 160 DR. SHUPELDT ON THE AFFINITIES [Feb. 20, prominent, longitudinal, the two middle ones connected on the disk and sending back a branch parallel to the others, all of which continue out to the tip; suture of the clavus deeply defined, the clavus wide and nearly triangular. Legs stout, placed close together • O N C E R O D E S ROBUSTA, sp. nov. Short, thick, very convex, opaque bluish-black, with a velvety aspect above. Base of the hemlytra, including the scutellum, clavus, and a spot expanded on the costal margin, bright yellow. Head transversely rugulose, the front piceous, with the throat and antennae dull honey-yellow; the rostrum a little darker. Legs thick and short, honey-yellow. Venter dull black, rufo-piceous on the genital pieces. Length to tip of hemelytra 1| millim.; width of pronotum | millim.; width of hemelytra f millim. A single specimen was found on the leeward side of the island. In respect to form of body and longitudinal direction of veins on the hemelytra this insect bears some relation toHypselosoma,Beuter ; but in all other respects it seems sufficiently different to constitute a separate genus. 4. On the Affinities of the Steganopodes. By Dr. B. W . SHUFELDT, C.M.Z.S. [Received January 25, 1894.] Becently I have written an account of the osteology of all the North-American Steganopodes, illustrating it with many figures of the representative species. This, extending as it would to between one hundred and two hundred pages, is altogether of too great length to submit on the present occasion; it may be of interest, however, to offer some of the conclusions arrived at with respect to the relationships of the birds constituting that suborder. Basing then, as we do, our judgment on a study of the skeletons of the Steganopodes, we are justified in regarding them as being composed of three superfamilies. These may be designated as, first, the Pelecanoidea ; second, the Phaethontoidea ; and third and lastly, the Fregatoidea. Arranging these, and the North-American families of them, with their genera, a taxonomic scheme on such a basis would stand thus :- SUPERFAMILIES. Pelecanoidea. Phaethontoidea. Fregatoidea. FAMILIES. Pelecanidae. Phaethontidae. Fregatidae. GENERA. Pelecanus. Phalacrocorax. Anhinga. Sula. Phaethon. Fregata. |
