252 [April, 



Mastododeba coccinea. 



^agna,rohiista,rufa ; eh/tris paullo rufo-velutinis exceptis,nuda ; jjros- 

 terno medio, mesosterno et coxis omnibus nigris ; cainte fere ut in M. nodicolli, 

 oculis minor ib us colloque crassiori ; antennarum scapo subclavato : tJioracis 

 tuberibus quatuor dorsalibus fere cequalibus, tubere laterali magno, p)auUo 

 curvato : elytris amplis, apice integris, supra basin versus punctulatis ; tarsis 

 posticis articuli basali triangulari haud elongato. Long. 18 lin., ? . 



The colour o£ this large and conspicuous insect is nearly that of 

 red sealing-wax, including antennae and legs ; the black portions 

 are confined to the coxre and the surrounding parts of the sterna. 



Madagascar. 



The thorax is impunctate, and, like the rest of the body, slightly 

 shining. Some patches of silky pubescence on the elytra have, in 

 certain lights, a beautiful rosy tint. 



Mastododeea difpoemipes. 



M. nodicolli angustior, capite, corpore subfus, antennis et tibiis nigris, 

 thorace sanguiiieo, elytris fuJvis subglabris margine laterali et sutura anguste 

 nigris : pedibus posticis (prcEcipue tarsis) elongatis, tibiis ap)ice intus subito 

 dilatato-sahlobatis, tarsis testaceo-Jlavis ; femoribus omnibus rufo-castaneis 

 basi nigrij, tarsis 4i-anticis nigris. Long. 10^ lin., S ■ 



The head is more elongated in front of eyes, and the base of the 

 antennae proportionately more remote from the latter than in Jf. nodi- 

 collis ; but the shape and granulation of the eyes are the same. Head 

 and thorax are covered with close minute punctures ; the latter has 

 four rounded, slightly elevated tubers on the surface, besides one, more 

 conical, on each side, a little before the middle. The elytra are less broad 

 at the shoulders, and are singly somewhat nari^owed towards the apex, 

 the latter briefly truncated. The dilatation of the apex of the posterior 

 tibia) forms an obtusely angular, compressed lobe. The claw-joints 

 of the tarsi are dilated almost as much as in Logisticus rostratus. 



Madagascar. 



Bai'tholomew Road, Kentish Town : 

 March, 1879. 



Is Dytisciis latissimus found in North America ? — My regretted friend, the ate 

 G-. R. Crotch, has recorded this species as North American, chiefly, I believe, 

 from information furnished to him by myself. In the Trans. Am. Ent. Soc. (De- 

 cember, 1876, p. 250), Dr. Horn has published the following note on the subject : — 

 " Di/tiscus latissimus, Lin., should not be included in our lists. I am satisfied that 

 the species was never alive on this side of the Atlantic, and from the number of 



