226 bulletin: museum of compakative zoology. 



176. x^MPHELICTOGON OBSCURUS, Sp. nOV. 



Type. — M. C. Z. 4,489. Cuba: Guantanamo, La Cabrera, April 

 9, 1913, under stones. Paratypes.— M. C. Z. 4,490, 4,491. Cuba: 

 El Oeujal, October 13, 1913. C. T. Ramsden. 



In size and general appearance suggesting .4. pallidipes; but when 

 in full color the legs and antennae are bright red excepting the proximal 

 joints of legs and the tarsal tips. The dorsum is deep blackish or 

 chocolate-brown, paler over keels but not clear yellow, lightest at the 

 margin; the caudal border also obscurely lighter, the lighter stripe 

 widening at middle. 



Teeth of caudal margin of keels in usual position, the outer one of 

 moderate size, acute but broad across base, much larger than the 

 inner one. Processes of nineteenth keels very short, narrow, and 

 subacute distally. 



Easily distinguished by the structure of the male gonopods. The 

 projecting angle on the ectal side of the dorsal branch near the distal 

 end of the length is longer, more slender and more acute than in the 

 other species. Style very characteristic; this from its origin runs 

 cephalad and then curves ventrad, back caudad and then dorsad 

 to complete a circle, thereafter running mesad and toward the end 

 coiling in corkscrew manner. Terminal blade of upper (anterior) 

 branch long and slender, running mesad or a little ventrad of mesad, 

 then caudad and curving dorsad and back a little cephalad, widely 

 crossing that of the opposite gonopod. 



Length (male type), about 25 mm.; width, 3 mm. 



177. Amphelictogon dentatus, sp. nov. 



Typc.— M. C. Z. 4,492. Paratype.— M. C. Z. 4,493. Cuba: 

 Alto de La Union, Mt. Libano, May 18, 1913. Under stones. C. T. 

 Ramsden. 



In the color-markings this species much resembles A. cuhanus; but 

 the yellow lateral border of the keels is obviously broader as is also 

 the stripe along the caudal edge of the metazonites. The latter stripe 

 is similarly extended at the middle, the yellow spots on the middle 

 of the prozonites being especially conspicuous. The first tergite is 

 bordered with yellow all around. The head is yellow adjacent to the 

 first tergite and, as usual, over the labrum and lower side of head and 



