BY ARTHUR M. LEA. 739 



The entirely dark club, curious metasteruum and front tibije, 

 render this species very distinct. The undersurface of the abdo- 

 men of the type-male appears to be concave along the middle and 

 obtusely tuberculate in places, but is so gummy that I may be 

 mistaken as to the tubercles; and, as it is rather damaged, it was 

 not subjected to treatment to remove the gum. 



The elytra, except at base and suture, are slightly paler than 

 the prothorax. The three apical joints of tlie antennse are almost 

 black; and from no direction do any appear produced on one 

 side. The front tibiae from the base to the middle very feebly 

 increase in width, and then rather suddenly decrease and become 

 very feebly curved to the apex; from the middle, a seta projects. 

 I have regarded them as dentate, but that is perhaps hardly 

 correct, 



Rybaxis variabilis, n.sp. 



(^. Of a rather bright reddish-castaneous, appendages slightly 

 paler, abdomen slightly darker, head still darker, sometimes 

 almost black. With fairly uniform, pale, and I'ather short 

 pubescence. 



Head with a fairly large round closed fovea close to each eye; 

 and with a large, shallow, interantennal depression. Antennae 

 rather long, first joint rather stout and subcylindrical, fifth slightly 

 longer than fourth and just perceptibly longer than sixth, seventh 

 and eighth decreasing in length, ninth slightly longer and wider 

 than eighth, tenth decidedly larger and trapeziform, eleventh 

 slightly longer than ninth and tenth combined. Prothorax 

 almost as long as greatest width, sides widest and strongly 

 rounded at about one-third from apex; each side near base with 

 a, large fovea, the two connected by a strong curved impression, 

 which is slightly drawn backwards at middle; with a narrow 

 impression almost at extreme base. Elytra dilated posteriorly; 

 dorsal strise deep at base and very distinct to near apex; with 

 rather distinct but irregularly distributed punctures; epipleural 

 furrow deep, straight, and short. Upper surface of abdomen with 

 & transversely oblong medio-basal node; lower surface gently 

 flattened in middle, the penultimate segment feebly concave in 



