2 Jdurnal of Eiitonioldgy and Zoology 



Color of Siip/Hiscd Mule — Ccphalothonix and maxill;t, dark red- 

 dish brown. Abdomen and legs light yellow brown. 



Color of supposed Feiiuilc and Juvenile — All parts bright yellow 

 l''i'()\\ n. 



Cephalothorax suboval, upper margin strongly concave at the 

 sides and tapering to a point at the median line. Sides convex at 

 upper edge; lower margin strongly convex. The cephalothorax is 

 strongly chitini/.ed, showing two small o\al spots. The small 

 subo\al area between the chitinized cephalothorax and the abdomen 

 is soft with fi\e chitinized plates. 



On the dorsal surface of each abdominal segemnt are two muscle 

 depressions, while on the \entral surface the fourth, fifth and sixth 

 segments ha\e dark colored plates near the segmental di\isions 

 which are used for muscle attachments; besides the two muscle 

 depressions. 



The book-lungs openings are found on the \entral surface of the 

 first abdominal segment, as is also the epigynum. 



The caudal appendage of the ju\enile and female is made up of 

 three small joints tapering to a blunt end. It is held in an upright 

 position above the abdomen. Cook in his description supposed 

 this form to be a female or juvenile; Krayselin considers it a dif- 

 ferent species, but upon close study of the rest of the organs of 

 this form it was finally decided that it was a ju\enile and probably 

 a female, the supposition being held that the juvenile took the form 

 of the female, as is often the case, until the last few molts. The 

 epigynum of this form was extremely undeveloped, having only a 

 small epigastic furrow with depressions at either end. 



The caudal appendage of the supposed male is made up of two 

 stout joints to which is attached a heart-shaped body tapering to a 

 blunt apex. This body has deep pits both on the dorsal and ven- 

 tral sides near the base. 



t)n the tibia of the first pair of legs are two long special sensory 

 hairs set in little pits. On the second, third and fourth legs one 

 hair was found, also on the tibia. These hairs are three-fourths 

 as long as the leg. 



The mouth parts consist of a pair of strong mandibles and lab- 

 ium. The labium is placed between the two coxae of the maxilhe. 



