I9I4-] Kellogg & Paine : Mallophaga. 223 



The thorax is longer than the head and broader ; colour 

 rather darker than head or abdomen, but with few markings. 

 Prothorax semicircular, with rounded diverging sides and straight 

 posterior margin ; posterior lateral angles with a prominent 

 hair. Metathorax longer than the prothorax, triangular-shaped, 

 with broadly rounded anterior angles and convergent sides meet- 

 ing in an angle on the abdomen ; three prominent hairs arise 

 on the anterior angles and a number of shorter ones along the 

 posterior sides. Legs ordinary, pale in colour with a few hairs. 



Abdomen pale, short and almost parallel-sided, shorter than 

 head and thorax together. There are but few dorsal hairs. A 

 slightly coloured submarginal band runs the length of the ab- 

 domen on each side and is broken at each suture, leaving 

 a clear space in which is a darker, narrow blotch running cross- 

 wise. The posterior margin is deeply emarginate and the last 

 segments are compressed on the meson. The genitalia, as be- 

 fore mentioned, are very large, with long rectangular basal 

 portion and two pairs of prominent appendages, the external 

 pair being flattened and blade-like and less chitinized than 

 the other two ; the strong muscles reach almost to the thorax. 



The female (plate xv, fig. 7), at first sight, seems to be 

 very different from the male, but upon closer observation, it 

 is seen that this difference is caused by the lack, in the fe- 

 male, of the abnormal developments of the male. Compared to 

 the male, the female is almost characterless. The only breaks 

 in the continuity of the outline of the head in this sex are 

 the slight antennal emarginations, the almost imperceptible pro- 

 trusion of the eyes and the concave occiput. The front ex- 

 tends further forward than in the male and the two long cly- 

 peal hairs are replaced by short ones. The antennae (plate 

 XV, fig. ya) are ordinary with the second segment the longest. 

 The hairs that appear on the posterior margin of the meta- 

 thorax in the male, are apparently lacking in the female. The 

 abdomen is much longer in proportion to the rest of the body 

 than in the male, being longer than the head and thorax to- 

 gether, and is almost parallel-sided, this being a characteristic 

 of the species, as before noted The last segment is entire 

 with four long hairs : no dorsal hairs are visible. 



Measurements : 

 &, Length' 17 mm. Width. $ , Length i'95 mm. Width. 



Head 50 39 



Prothorax -22 -48 



Metathorax -26 5^ 



Abdomen 86 76 



Gentalia, exposed 



portion. "37 '19 



1 Not including genitalia. 



