4gg PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



abdomen, the anus opening on the ventral surface of the genital 

 segment near the bases of the fourth processes. 



First antennae short and indistinctly jointed; basal portion en- 

 larged and flattened into a wide lamina from whose inner corner 

 projects a distal portion which is cylindrical and of about the same 

 length as the basal portion. There is one long seta outside the 

 base of the distal portion and three at the tip, one of which is much 

 shorter than the other two. Second antennae in the form of flat- 

 tened lamina?, elliptical in outline and divided at the end into two 

 short rami. The dorsal ramus is pointed and armed with a short 

 spine; the ventral one is rounded and covered with corrugations. 



The mouth tube is large and subterminal ; the mouth opening is 

 surrounded by a fringe of long hairs. The mandibles are long and 

 narrow, enlarged at the base but of about the same width through- 

 out the distal portion, and armed with eight or ten irregular teeth 

 on the inner margin at the tip. The maxilla? are half the length 

 of the mouth tube and fairly stout; they are divided into three rami, 

 two at the tip, slender and of the same length, each ending in a long- 

 spine, and one much shorter and stouter on the ventral margin, end- 

 ing in a short spine. 



First maxillipeds with stoutly swollen basal joints and compara- 

 tively slender and weak terminal joints; the latter are less than half 

 the length of the former and end in a tiny claw, evidently of no use 

 for prehension. 



Total length, 5.5 mm. Length of neck and head, 3.1 mm. ; of gen- 

 ital portion, 2.4 mm.; of egg cases, 1.2 mm. Width of neck at its 

 base, 1 mm.; of genital portion at its posterior end, 2 mm.; of egg 

 cases, 1 mm. 



Color. — (preserved material) a uniform dark orange, the egg 

 st lings inclining toward pink. Bulla and its pedicel very dark 

 brown, almost black. 



Male. — Body stout and strongly arched dorsally, with a slight 

 constriction between the head and genital portion and almost no 

 traces of segmentation. Mouth parts clustered at the anterior end 

 close to the mouth tube. 



First antennae distinctly three jointed, basal joint considerably 

 longer than the others and carrying on its outer distal corner a long 

 spine: the two terminal joints about the same length, the last one 

 cm ling in a bunch of setae. Second antenna 1 cylindrical like the 

 first pair instead of being flattened into Laminae, as in the female; 

 armed at their tip with a dorsal curved claw and a ventral corru- 

 gated knob. 



First maxillipeds similar to those of the female; second pair de- 

 veloped into large, powerful prehensile organs, the basal joint swollen 

 and projecting on the inner margin into a long and stout spine which 



