1903.] COLEOPTERA OP THE PERCY SLADEN EXPEDITION. 257 



Although, owing to the confusion which has prevailed as to 

 the not easily distinguishable black species of Maa'ccspis, this 

 species has remained without a name, it is a well-known Brazilian 

 insect and evidently ranges over a large tract of covintry. The 

 specimens from Ega, referred by Mr. Waterhouse to M. dichroits, 

 belong to this species. Of M. dichrous Mann, the British Museum 

 contains as yet only a single female specimen, exactly agreeing 

 with that figured by Mannerheim. This species is barely dis- 

 tinguishable except in colour from M. crihratus Waterh., but 

 may be easily distinguished from M. brasilierisis when the 

 specific characters have been recognised. The latter diflfers from 

 both in having no lateral expansion of the elytra in the female. 

 The male has the last abdominal segment rather less strongly 

 trilobed, the middle lobe being broader and less produced ; and in 

 both sexes the rows of large setigerous punctvires near the margins 

 of the segments have almost disappeared. The sculpture of the 

 upper surface is almost the same as in M. cribrata, but generally 

 rather finer, and there is a very slight but constantly visible linear 

 impression along the middle of the scutellum, which serves to 

 distinguish this species from all the rest. 



Ctclocephala paraguayensis, sp. n. 



J^usco-rufa, vertice nigro, elytris testaceis ; capite grosse punc- 

 tato, inedio leviter longitudinaliter sulcato, clypeo subquadrato ; 

 prothorace scutelloque sat fortiter punctatis ; elytris annu- 

 lariter punctatis ; pygidio crebre subtiliter punctatis. S un- 

 guiculorum anticoricm internaliuni ramis haud valde diver- 

 gentibus. 

 Long. 12 mm. 



This is one of the closely similar species forming the melano- 

 cepAa^- group. Like C. laminata Burm., it is distinguished from 

 the other members of that group by the anterior claws of the 

 male, in which the two branches of the inner member are not 

 strongly divergent. From C. laminata it difiers by the thicker 

 puncturation of the thorax and scutellum and the densely and 

 finely punctured pygidium, which, however, is not rugose as in 

 C m,elanocephala, dimidiata, and vincentice. There is no appreci- 

 able difierence between the two sexes in the sculpture of the 

 pygidivim. 



Naupactus tuberculatus, sp. n. 



Niger, pallide brunneo-pttbescens, capitis prothoracisque linea 

 alba media e squamis rotundatis coinposita ; scutello albo- 

 squamoso ; elytris costatis, interstitiis squamis mimitissimis 

 rufescentibus instructis ; rostro paulo lato, lateribus parallelis ; 

 prothorace (S) quam latitudinem longiore, post medium 

 lateraliter valde spinoso, disco leviter Q-tuberculato, tuberculis 

 4 medio approximatis, 2 pone marginem aniicam aliisque 

 m,inus evidentibus prope angulos, omnibus nudis nitidis ; 

 singula elytro casta suturali aliisque duabus mcdis, nitidis 

 Proc. Zool. Soc— 1903, Yol. II. No. XVII. 17 



