Mallophaga from Birds of Costa Rico, Central America 41 



narrow, transverse bands at the anterior niarc^in of segments two 

 to eight, ending- at the pale lateral band ; a darker median area in 

 segment seven ; segment eight translucent, with a deep brown 

 blotch in anterior portion and a clear brown, crescent-shaped 

 band around the tip, 



Male. — Body, length 8.29 mm., width 2.17 mm.; head, length 

 1.65 mm., width 1.56 mm. ; similar to female, except in size, and 

 the tip of abdomen, which is slightly swollen laterally and flatly 

 indented at the tip, with a narrow band around anterior border, 

 a dusky spot in each side of the median portion, and the same 

 band around tip as in female. 



Numerous males and females collected from specimens of 

 Buteo borcalis costaricoisis, shot on the volcano Irazu, April, 

 1902. This form is quite close to Piaget's Lac. titan, but is dis- 

 guished from that species by the clear temples, the absence of a 

 dark band across the middle of the antennal swelling, by the 

 heavier lateral abdominal bands, internal metathoracic Imnds, and 

 absence of clear pustules on abdomen, and by the difference in 

 the shape of the legs and fewer hairs on margins of abdomen. 



Physostomum jiminezi sp. nov., pi. V, fig. 1 



Female.— Body, length 3.06 mm., width .97 mm.; smoky ful- 

 vus throughout, abdomen with darker lateral bands and median 

 transverse bands; legs very dusky, femora margined with 

 blackish. 



Head, length .71 mm., width .57 mm. ; conical, with flatly 

 rounded, bare front; palettes projecting by apical segment; sides 

 of head slightly sinuated with one weak hair at anterior margin 

 of antennal fossae ; a slight ocular notch with one very fine bris- 

 tle ; temples produced backward, ending in a blunt spine, very 

 slightly turned outward, with three weak hairs ; occipital margin 

 reentering, occiput flatly convex ; a pale fulvous band across the 

 forehead at the base of the palettes ; a pale indistinct band along 

 the lateral margins of the head, disappearing at the antennal 

 fossae; antennal fossae of unusual size, with inner portion bor- 

 dered with blackish but outer bounded only by a very faint line ; 

 a black ocular fleck; a narrow, fulvous, submarginal occipital 



163 



