18 Journal New York Entomological Society. [Vol. xvi. 



rows of punctures ; the submarginal stria is absent. The female has 

 five or six impressed striae at sides on each elytron in addition to the 

 discal rows of punctures, but all the stria? are very short and much 

 abbreviated at base and apex, the marginal stria is absent. In one 

 specimen the strhe are much better marked than in the other. 



Copelatus cubaensis, new species. 



Form of glyphicus, fuscous ; underside, legs, antennae and a transverse basal 

 fascia, paler. Head finely but not very densely punctate. Thorax transverse ; hind 

 angles rounded ; front angles prominent, acute ; impressed on each side, the impres- 

 sion broad near base but narrower towards apex ; surface finely punctate and with a 

 few rather indistinct, impressed lines, the punctuation coarser at sides near base. 

 Scutellum smooth. Elytra somewhat prolonged at apex ; surface with six entire 

 striae ; sutural striae abbreviated at base, submarginal striae not quite reaching to middle ; 

 intervals distinctly, but finely punctate, nearly equal in width, the two outer ones 

 slightly narrower than the inner striae. Underside with more or less distinctly 

 impressed lines. Front tibiae as in glyphicus. Length 5 mm. 



Cayamas, Cuba, one female in the collections of the National 

 Museum, collected by Mr. E. A. Schwarz. 



Type. —No. 11545, U. S. N. M. 



This species, by the number of elytral striae and the possession of 

 a submarginal stria, has to be placed in Dr. Sharp's group X and is 

 remarkable for being the first species in this group from the New 

 World. 



Copelatus angustatus Chev., Ann. Fr. , 1863, p. 201. 



A few specimens collected by Mr. Schwarz in Cayamas, Cuba, and 

 identified by him as angustatus Chev. are before me. This species was 

 unknown to Dr. Sharp, who gave only Chevrolat's short original 

 description on p. 767 of his monograph "On Aquatic Carnivorous 

 Coleoptera or Dytiscidae. ' ' The specimens agree with the description. 

 They are of the form and size of glyphicus, but more shining ; base, 

 lateral margin and apex of elytra pale, each elytron with two discal 

 strise, the submarginal not quite extending to base, surface punctate ; 

 thorax in the male without, or with a very few fine scratches at sides 

 in the female ; front and middle tarsi more dilated than in glyphicus. 



