Pacijic Coast of North America. 181 



pair reach the middle of the second 

 thoracic segment. Sixth and seventh 

 pair of legs show a marked dispro- 

 portion in the length of the propodus. 29. T. alascensis, Richardson. 

 «'. Terminal segment of ahionien -widely 

 rounded.. Outer branch of the uro- 

 poda not longer than inner branch. 

 First pair of antennae reach th^^ poste- 

 rior angle of the third thoracic seg- 

 ment. Second pair of antennae reach 

 the middle of the fourth thoracic 

 segment. Sixth and seventh pairs 

 of legs show only a gradual increase 

 in size 30. T. convextis, sp. n. 



29. Tecticeps alascensis, Richard.son. 



Tecticeps alascensis, Richardson, Proc. Biol. So3. Washington, xi. 

 1897, pp. 181-183. 



Fiff. 14. 



Tecticeps alascensis, Richardson, x 2^. 

 Bah. Alaska ; Kamchatka. 



30. Tecticeps convexus^ sp. n. 



Body oval, somewhat flattened. Surface smooth; colour 

 light yellow with markings of brown. 



llead with the anterior margin much broader than the 

 posterior margin, produced in front, but not wholly concealing 

 the basal joints of the first pair of antennae, and somewhat 

 raised, forming two small convex elevations. The antero- 

 lateral margin is likewise produced, forming an acute angular 

 projection, which extends in a lateral direction beyond the 

 post-lateral margin of the head. The eyes are dorsally 

 situated in a median transverse line. Tiie first pair of 

 antennae, with a flagellum of sixteen articles, extend to the 

 posterior angle of tlie third thoracic segment. The second 



