504 CALIFORNIA ACADEMY OF SCIENCES. 



lateral bands with short sharp irregular inward projecting 

 processes; segment 3—6 with oblong, median, brown 

 blotches, darker on segments 5—6 and not reaching the 

 lateral bands; segment 8 with a narrow angulated or 

 curving transversal black line connecting the lateral bands ; 

 segment 9 uncolored or whitish, angularly but not deeply 

 emarginated. 



Lipeurus macrocephalus n. sp. (Plate Ixviii, hg. 3). 



Many specimens taken from a Western Night Hawk, 

 Chordeiles virginianus henry i (Palo Alto, Calif.). This 

 species shows an affinity with Lipeurus hypoleucus N. 

 (taken by Nitzsch in 1814 from Caprimulgus curoptrus, 

 and first called by him Nirmus concolor, and then JV. 

 hypoleucus, under which name Giebel, Insecta Epizoa, p. 

 146, pi. viii, fig. 5, and Denny, Monograph. Anoplur, 

 Brit., p. 141, pi. vi, fig. 8, refer to it; and finally cor- 

 rectly removed by Piaget, Supplement, p. 66, pi. vii, fig. 

 3, to Lipeurus) by the general outline, the hairs of the 

 head, and the character of the thoracic segments. The 

 new species differ from hypoleucus distinctly, especially 

 in the shape of the head and the character of the signa- 

 ture. Oddly enough Piaget was unable to find a male 

 among his specimens, and among the twenty-seven speci- 

 mens of the new species taken from the single individual 

 of Chordeiles examined there is no male. 



Description of female. Body, length 3 mm., width 

 .66 mm. ; fuscous, with dark rusty brown lateral bands 

 on abomen and thorax, and distinct occipital and antennal 

 bands of head. 



Head, length .65 mm., width .5 mm. ; forehead as long 

 as hind head, tapering but little and flatly convex, almost 

 truncate in front: suture distinct, both at margins and 

 behind signature; four short hairs in front of suture, the 



