146 TJniversity of California Publications. [Zoology 



tinctly separated by cross lines; posteriorly the areas are dis- 

 tinctly circumscribed and are not arranged in rows. 



The antenniile of the male is very similar in size and armature 

 to that of Philomedes ; a sensory seta is borne by the antepenul- 

 timate joint ; the basal third of this seta is enlarged and bears 

 long', setiferous processes only on the outer side. The frontal 

 organ is small, two-jointed ; second joint enlarged, forming a ca- 

 pitulum. The first and third joints of the natatory branch of the 

 antenna are elongated and together they compose about two- 

 thirds of the length of the limb; the first joint bears no setae; 

 second joint with a seta which is armed with short, stout spinules 

 on its outer margin ; each of the following six joints bears a long, 

 plumose seta; the last joint bears six setae, two of which are 

 snuill, the smallest possessing no plumules. The secondary branch 

 of the antenna is prehensile, composed of three joints ; first joint 

 sub-cjuadrangular, with five small simple setae at the proximal 

 end and a long seta, bearing a few plunudes in the middle, at the 

 outer end ; second long and slender, with two setae on the inner 

 margin ; third nearly as long as the second and reflexed upon it, 

 with two minute setae near the outer extremity ; distal end with a 

 few crenulations. 



The basal joint of the mandible is M'ithout masticating process 

 and setae : the first joint of the mandibular palp bears seven small 

 simple setae and two larger plumose ones on the lower margin, 

 and three simple ones on the upper margin ; at the distal end of 

 the upper margin is a process which bears two setae; second joint 

 of palp much smaller than first, with four setae on the lower mar- 

 gin, one of which is plumose ; third elongated, cylindrical, bear- 

 ing seven setae on the upper margin and five on the lower; the 

 three distal setae on the lower margin differ from the others, two 

 of them possess a comb of minute spines on one side and have 

 three prongs at the end, while the smallest bears some minute 

 prongs near the end ; last joint small, with three claws and three 

 setae. 



The first maxilla consists of a long two-jointed principal lobe 

 which has a number of setae at its end, and four small lobes 

 which also bear numerous setae ; none of the setae denticulated, 

 but some are rather stiff and claw-like, and a few are plumose. 



