NEW MALLOPHAGA. 489 



wich Sparrow, Amodramus sandzvichaisis, from Palo 

 Alto, California. 



Variations among the specimens are apparent, but un- 

 til I can examine a much larger series no attempt can be 

 made to tabulate these variations. The species may be 

 recognized by comparison with the figure in plate lxvi. 

 This specimen, a female, was taken from a White-rumped 

 Shrike, Lanius ludovicianus excubitorides (Lawrence, 

 Kansas), and measures: Body, length 2. mm.; width 

 .87 mm.; head, length 6mm.; width .6 mm. 



Docophorus excisus Nitzsch. 



Gennar's Mag. f. Ent., 1818, vol. iii, p. 291. 

 Pediculus hirundinis Linnaeus, Fau. Suec, 1746, p. 1963; Schrank, 



Fauna Boica, 1781; Fabricius, Sp. Ins., 1783, vol. ii, p. 483; 



Linmeus, Syst. Nat., ed. 13, 1779, vol. i, p. 2921. 

 Ricinus hirundinis Latreille, Hist. Gen., 1804, vol. viii, p. 111. 

 Philopterus excisus Nitzsch, Germ. Mag. f. Ent., 1818, vol. iii, p. 291; 



Burmeister, Handb. d. Ent., 1835, vol. ii, p. 425; Walckenaer, 



Hist. Nat, Ins. Apt., 1844, vol. iii, p. 333. 

 Docophorus excisus Nitzsch, Giebel, Zeitschr.f. ges. Naturwiss., 1861, 



vol. xviii, p. 298, 1. c. 1866, vol. xxviii, p. 359; Giebel, Insecta 



Epizoa, 1874, p. 8S, pi. ix, figs. 1, 2, 3; Piaget, Les Pediculines, 



1S80, p. 64, pi. iv, fig. 6. 



Specimens which may be referred to this long known 

 parasite of the swallows taken from the Cliff Swallow, 

 Petrochelidon lunifrons, and from the Tree Swallow, 

 Tachycineta bicolor (Palo Alto, California, and Lawrence, 

 Kansas). The American specimens are, however, mark- 

 edly larger than the European ones and should be desig- 

 nated by a varietal name. Piaget's measurements are, 

 for males, length i m., for females i.i mm.; the males 

 among my specimens are about 1.3 mm. long and the fe- 

 males 1.5 mm. long. The species of this group (with 

 square emargination of clypeal front) which I have de- 

 scribed from the Purple Martin (see page 475, plate lxv, 

 fig. 4) shows all of the general habitus of excisus, but is 



Proc. Cal. Acad. Sci., 2d Ser., Vol. VI. ( 3i ) November 10, 18%. 



