18 Psyche [February- 



Thorax shorter than head. Prothorax trapezoidal, with divergent sides and 

 blackish submarginal bands; these bands turn inward and downward before they 

 reach the prominent, acutely projecting posterior lateral angles, forming the first 

 intercoxal bands; a short, heavy spine on these posterior lateral angles and another 

 smaller one a short distance above on the lateral margin; posterior margin slightly 

 sinuous. 



Metathorax wider than prothorax, quadrilateral, with rounded angles; two 

 long, prominent, submarginal hairs a little below the anterior angles, and another 

 in each posterior angle. Dark chestnut to blackish submarginal bands, connecting 

 with those of the prothorax and turning in along the posterior margin of the meta- 

 thorax to form the second intercoxal bands. Posterior margin straight for about 

 one-third its length on each side, at which point, where a long, pustulated hair 

 arises, it becomes faint, turning downward at an angle of about thirty degrees 

 and fading out completely before it reaches the meson. There are two small, 

 pustulated hairs on the dorsal surface above, and a little inward from those on 

 the posterior margin. Posterior legs with peculiarly long, straight tibiae bearing 

 numerous spines; the mesothoracic legs have been broken off; the anterior ones 

 are short, being carried concealed under the broad temples. 



Abdomen considerably narrower than the head, obovate, with sides straight and 

 slightly divergent until the widest point is reached at the fourth segment, where- 

 upon they round off gradually to the eighth; eighth segment short, not reaching 

 as far posteriorly as the seventh or ninth ; ninth segment rounded and protruding. 

 Prominent, bipartite, lamelliform plates or appendages on the dorsal surface of 

 each segment from the first to the sixth, extending inward from the lateral margin ; 

 inner portion a narrow, pointed appendage, separated from the lateral, linear por- 

 tion by a deep sinus, embracing a long pustulated hair; in Taschenberg's 1 figure of 

 G. aliceps Nitzsch, these plates are lacking on segment one; this, however, may be 

 due to a mistake by r the artist. Corresponding to these plates, in position, on the 

 ventral surface of segments two to six are the characteristic series of dark colored, 

 blunt, comb-like spines (Fig. 3b); the number of spines on each segment agrees 

 with G. laticeps Piaget, diminishing from fifteen on each side of the second segment 

 to three on each side of the sixth ; the number, however, as noted by Taschenberg, 

 is slightly variable; broad, darkish, lateral bands cover the region of the combs and 

 lateral section of the dorsal plates. In length segment one is the shortest, with 

 slightly diverging sides, not appearing as a part of the thorax as in the case of G. 

 laticeps Piaget; segment two the longest, the following segments diminishing in 

 length to the fifth, and then increasing slightly to the seventh; a series of pustulated 

 hairs across the middle of each segment, stopping before the lateral appendages are 

 reached; also hairs in the posterior lateral angles of each segment, and segment seven 

 bearing a group of about ten very long ones on the ventral surface. Genitalia 

 similar to G. aliceps, being composed for the most part of two long, narrow, chitinous 

 rods. 



1 Taschenberg, O. Die Mallophagen. Nov. Act. Kaia. Leop. Carol.-Deutschen Akad. 

 Naturforsch. Bd. XLIV, Nr. 1. Tab. 1, fig. 5. (1§82). 



