166 bulletin: museum of comparative zoology. 



First tarsus of first legs consisting of seventeen articles, that of the 

 second of sixteen, with the second division embracing thirty-six. 



Stoma in each case reaching the edge of the posterior emargination. 

 Last principal tergite with caudal margin straight. 



Length of type (female) about 16 mm. 



GoNETHiNA, gen. nov. 



Differing from Gonethella in the apparently more primitive antennae 

 in which the three divisions are obvious w ith the first two of these un- 

 usually short and consisting in each case of less than half as many 

 articles as in the other genus, in the type forty and seventy-five respec- 

 tively. Articles very short. Joints of first and second tarsi much 

 fewer, six to nine or ten in the first and twenty to twenty-six in the 

 second. The tergites are wholly free from spines, bearing only fine 

 short hairs. Gonopods as in Gonethella. 



Genotype. — G. grenadensis, sp. nov. 



54. GONETHINA GRENADENSIS, Sp. nOV. 



Type. — M. C. Z. 1,880. 9. Grenada: Grand Etang, September, 

 1910. 



In this species the median dorsal light stripe is proportionately 

 very wide, in the middle region exceeding the width of the dark stripe 

 on each side of it. The dorsal surface of the head is light, the light 

 area enclosing two dark areas behind and two in front, each pair of 

 dark areas obscurely united. Legs dark, paler distad, the dark color 

 more or less clearly broken into annuli by narrow pale bands; the 

 annuli on the tibiae especially distinct, there being three light rings 

 one of which is distal, one median, and one a little distad of the base; 

 the first division of the tarsus with a brighter annulus at its distal 

 end. 



Stoma saddles moderately elevated. Stoma attaining caudal 

 edge, its lips projecting into the emargination. Last tergite with 

 caudal margin mesally conspicuously incurved. 



Antennae showing three distinct divisions of which the first two are 

 comparatively short. The articles, excepting the nodals, are very 

 short and closely crowded. The first division in the type consists of 



