106 Psyche [August 



head, .14 mm.; length of abdomen, .55 mm.; width of head, .1 mm.; 

 width of thorax, .15 mm. ; width of abdomen, .31 mm. 



Head rather cyhndrical, the anterior margin very flatly rounded, 

 the lateral margins parallel and practically straight, the temporal 

 angles entirely wanting. Antennae set close to the anterior mar- 

 gin, the second joint the longest, the others subequal. Last three 

 joints slightly wider than the second, giving the antennae a slightly 

 clavate appearance. 



Thorax about one and one half times as wide as the head and 

 slightly more than half as long. Lateral margins angularly con- 

 vex, posterior margin straight, the thorax as a whole having the 

 appearance of a distorted hexagon. A pair of rather long median 

 hairs on the posterior margin of the mesothorax and a short spine 

 slightly in from each mesothoracic spiracle. 



Legs of the type common to the genus, the anterior and middle 

 pairs being small and having slender claws, the posterior pair being 

 very large and stout. Sternal plate spatulate, a narrow handle- 

 like portion projecting between the anterior coxae. 



Abdomen oval, only slightly longer than wide, the greatest 

 width being near the center. Tergites and sternites without 

 chitinized plates and with the exception of the third sternite, un- 

 divided and bearing but one transverse row of spines. The spines 

 are in general rather slender, bluntly pointed, and slightly longer 

 than the segment on which they are borne. First to third seg- 

 ments each with a median group of four spines, the third also hav- 

 ing a pair of spines near each lateral margin. Fourth and fifth 

 segments each with a median group of eight or ten spines and lateral 

 groups of three or four. Sixth and seventh segments each with a 

 continuous row of eighteen or twenty spines. Eighth with median 

 group of six or eight. Seventh and eighth segments each with two 

 long hairs at the posterior lateral angles. Ninth segment with a 

 narrow, transverse, chitinous band behind which there is a median 

 pair of two small hairs. 



Second sternite with a median group of four to six slender 

 spines. Third sternite apparently with two rows of spines, the 

 anterior consisting of four, the posterior of eight, and with the pair 

 of chitinized areas which are practically characteristic of the genus. 

 Fourth sternite with eight spines, fifth and sixth with twelve, 

 seventh with eight, eighth with none. Ninth segment with a group 



