VO l869. n ] PROCEEDINGS OF THE NATIONAL MUSEUM, 189 



Lipeurus diomedeae F. $ , 9 , juv., and eggs. 



Fabricius's description is very meager. Dufour described it fully as 

 did Giglioli from 1). brachyura. Piaget thinks L. ferox of Giebel from 

 D. melanophrys the same, but makes diomedece the synonym. The 

 identity of the forms iroin the different species of Diomedece is sup- 

 ported by careful comparison of these specimens with the descriptions 

 of various authors and with a 9 from the D. brachyura in my possession. 

 The eggs inclosed in the vial with these and L. taurus probably (almost 

 certainly) belong to diomedece. They are very large, 2.4" 1 " 1 long. Their 

 shape is peculiar, reminding one of the valves of a barnacle, flattened, 

 attached by a short pedicel, the outline as a whole semicordate, the 

 straight line running from pedicel to apex and the opposite sides 

 curved. Black lines run along the margin and on each face parallel to 

 these, and a short, transverse line near the center ; between this and the 

 base are two irregular spots or expansions of the dark lines. 



(On Phaiton cethereus). 



No species have been described from this bird to my knowledge, and 

 if so it must have been since the publication of Piaget's " Les Pe.di- 

 culines" 



Docophorus sp. 



An undescribed species, 2 mm long, with triangular head, narrow 

 clypeus which is deeply emarginate. The color is brown, and the 

 transverse bands of the abdomen run without interruption the width of 

 the segments. Differs decidedly from I), hexagonus Giebel described 

 from Phct'ton phcenicurus, in having the clypeus deeply cut instead of 

 evenly truncate. Approaches D. breviantennatus Piaget, which occurs 

 on Sula australis, but appears to be slightly smaller and lighter colored, 

 while the abdominal bands are not interrupted in the middle. Three 

 specimens. If desired to designate by name it may be called Docophorus 

 phwtonus. 



Menopon sp. near fuseofascialinn Piag. 



Agrees very closely with fuscofasciatum described from Lestris poma- 

 rina except that it appears somewhat more robust than shown in 

 Piaget's figure. Whether the difference is sufficient for formation of a 

 new species is doubtful without comparison with specimens of that 

 species. 



Colpocephalum sp. near angulaticeps Piaget. 



Agrees more closely with C. angulaticeps from Fregata minor than 

 with G. incisum from Phaeton Jlavirostris. A very minute species, of 

 which there was a single specimen in the vial with other lice from 

 Phceton wthereus, and this was unfortunately lost by accident, an invol- 

 untary cough carrying it from the slide while placed under the micro- 

 scope for dry examination. 



