434 Mr. J. S. Baly on new Genera and Species 0/ Phytpphaga. 



more prominent, and causing the base of the elytra to appear 

 more abruptly truncate ; they are shorter in proportion to their 

 basal breadth, and at the same time more quickly narrowed 

 from base to apex, thus being less parallel and more regularly 

 wedge-shaped; they are less deeply depressed transversely be- 

 low the basilar space, their surface is more finely punctured and 

 opake ; the hinder thighs are shorter, thicker, and less attenuated 

 towards their apex ; viewed laterally, they are suddenly thickened 

 at their base, and then gradually increase in width to beyond 

 their middle. In S. speciosa they increase more gradually at 

 first, but remain for some distance in the middle at nearly 

 the same width ; viewed from above, the outer edge in S. muta- 

 bilis is more regularly curved, the thickest portion of the femur 

 being about or just beyond the middle ; in S. speciosa, on the 

 other hand, the thigh is more attenuated from its middle to its 

 apex, the thickest part being rather before than at the middle 

 itself. In the female the elytra are oblong-ovate, and not nar- 

 rowed from base to apex as in the male ; but I do not know any 

 characters by which the ? can be separated with certainty from 

 the same sex of S. speciosa, S. Druryi, and other allied species. 



Sagra Livingstonii. 



S. elongata, obscure cseruleo-nigra, supra subopaca, subtus nitida ; 

 thorace latitudine vix longiore, angulis anticis pauUo prominulis, 

 disco leevi, basi unifoveolato ; elytris intra humeros leviter im- 

 pressis, tenuiter sulcato-striatis, sulcis distincte punctatis, ante 

 apicem deletis, sulcis 5'" 6^", 7™° 8^", et 9°" 10"° poue medium non- 

 nihil per paria approximatis ; tibiis intermediis subtus ultra me- 

 dium dente obtuso armatis. $ 



Long. 8 lin. 



Hob. Zambesi River. 



This species is nearly allied to S. Urania and S. seraphica ; 

 the very obtuse tooth or spine on the under surface of its inter- 

 mediate tibiae wiU without trouble serve to distinguish it from 

 both those insects : by means of the above-mentioned characters 

 it enters into that section of the genus which contains S. tristis 

 and S. Murrayi; but the punctation of the elytra and the non- 

 prolongation backwards of the prosternum show without doubt 

 that it belongs to quite another section. 



Head finely punctured ; antennae rather longer than half the 

 body, robust, slightly increasing in thickness towards their apex, 

 third and fourth joints ovate, nearly equal. Elytra subparallel, 

 slightly narrowed towards the apex, the latter narrowly obtuse; 

 above moderately convex, very shghtly flattened along the suture, 

 not depressed below the basilar space; each elytron with ten 

 sulcate striae, the first short ; these striae, which are nearly equi- 



