486 CALIFORNIA ACADEMY OF SCIENCES. 



the Snowy Owl. It can be readily recognized by the 

 broad short head, with short broadly truncate forehead, 

 and correspondingly short and broad signature. The 

 genital blotches of the ventral surface of the abdomen of 

 both male and female are also characteristic. There is 

 considerable difference in size of the male and female. 

 The male which I figure measures : Body, length 1.78 

 mm., width .75 mm.; head, length .53 mm., width .6 

 mm. Female: Body, length 2.31 mm., width 1.03 mm.; 

 head, length .62 mm., width .75 mm. 



Docophorus rostratus Nitzsch. (Plate lxvi, fig. 5). 



Zeitschr. f. ges. Naturwiss. (ed. Giebel), 1861, vol. xvii, p. 529. 

 Docophorus rostratus N., Giebel, Zeitschr. f. ges. Naturwiss, 1861, vol. 

 xviii, p. 296; Burmeister, Haudb. d. Eat., 1835, vol. ii, p. 427; 

 Denny, «Mouograph. Anoplur. Brit., 1842, p. 87, pi. ii, fig. 4; 

 Giebel, Insecta Epizoa, 1874, p. 76, pi. x, tig. 4; Piaget, Les 

 Pediculines, p. 27, pi. i, fig. 7. 



Two specimens of this unmistakable Docophorus, taken 

 by Nitzsch, Denny and Piaget from Strix flammea, the 

 European Barn Owl; taken by me from the American 

 Barn Owl, Strix pratincohi (Soquel, California). The 

 American Barn Owl has always, until recently, been held 

 to be simply a variety (Strix f. -pratincohi) of the Eu- 

 ropean Barn Owl. The specimen figured by me measures : 

 Body, length 1.97 mm., width .5 mm.; head, length .75 

 mm., width .53 mm. The species is readily recognizable 

 by its slender abdomen and its very long head, with narrow 

 extended forehead. The head and thorax are longer than 

 the abdomen. 



Docophorus communis Nitzsch. (Plate lxvi, fig. 7.) 



Germar's Mag. f. Eut., ISIS, vol. iii, p. 290. 

 The following synonymy is that given by Picaglia in 

 his Pediculini dell Tstituto anatomo-zoologico della R. 



