242 bulletin: museum of comparative zoology. 



206. CuBODESMUs LiMOXEus, sp. nov. 



Type.— M. C. Z. 4,522. Paratypes.— M. C. Z. 4,523, 4,524. Cuba : 

 Guantanamo, El Palmar, Mai Paso, Mt. Toro, subida a la " Hem- 

 brita." C. T. Ramsden. 



This species differs strikingly in appearance from all the others in 

 having the keels of a lemon-yellow color with each light area extending 

 a considerable distance upon the dorsum proximad of the keel. Pro- 

 cess of anal tergite light. Black of head expanding widely below 

 antennae. Labrum yellowish, of reddish tinge adjacent to the dark 

 area. Prozonites blackish, the dark color extending ventrad to level 

 of legs as in C. pclopleunis. Venter and legs and antennae lemon- 

 yeIlow^ 



Slight lateral serrations on third and fourth tergites onh^ Caudal 

 angles in general but weakly extended. Processes of last tergites in 

 general as usual; those of the nineteenth a little longer than those of 

 seventeenth but narrower across base. 



Length (female paratype), 43 mm.; width, 7 mm. 



Male gonopods of usual type. Distal blade of upper branch short 

 and slender, strongly curving in a half circle. Upper process of upper 

 branch nearly straight, slender. 



Ellipodesmus, gen. nov. 



Body composed of head and but nineteen segments. 



Antennae long and slender. 



Dorsum low, only slightly convex, and wholly smooth throughout. 



First dorsal plate wath anterior lateral margins and forming an 

 evenly convex curve; narrowed subacutely at each side; equalling 

 the succeeding ones in width. 



Keels strongly developed throughout ; margins thickened. 



Pores on somites five, seven, nine, ten, twelve, thirteen, and fifteen 

 to eighteen inclusive; opening on moderate marginal thickenings, 

 the aperture looking subdorsad. 



Pores of anal scutum narrow, at tip narrowly truncate. Anal 

 valves mesally strongly margined. 



Genotype. — E. simplex, sp. nov. 



