272 ]\Ir. D. SHffp's Contrihiitiuiis to the 



maxillary ])al])l a little dilated in the middle on the inner 

 side antl ])ointed at the extremity ; 4th joint very minute. 

 Head -with a slender neck. Thorax sid)globose, the horny 

 portion of the prosternum large, so that in the natural 

 position it extends as far back as the front edge of the 

 mesosternum ; but the side pieces of the prothorax are not 

 contiguous Avith this, so that the anterior coxal cavities 

 are quite open behind. Mesosternum large, forming a 

 ■well-marked neck. Tarsi aj)])arently only four-jointed, 

 the 3rd joint being short, especially on the ujiper side; its 

 lower surface longer and hairy, and the 4th joint consisting 

 of a membrane, hairy beneath, en"\vraj)ping the sides and 

 imdersurface of the fifth joint on the hind foot ; the basal 

 joint is as long as the rest of the tarsus. Front tarsi 

 undilated in both sexes. 



This genus is allied to Sunins, but cannot be amalga- 

 mated therewith, owing to the different structure of the 

 prosternum. Its facies and form ave also different, and 

 approach LitJiocharis and Scopceus. It forms a connecting 

 link between the Pcederidce with closed anterior coxal 

 cavities and those in Avhich these are widely open, and 

 its position in the usually adopted scheme of classification 

 is between LitJiocharis and Sunias. The above characters 

 are drawn from a liio de Janeiro species, of Avhicli I give 

 a diagnosis in the subjoined note.* 



1. Monista certa, n. sp. Rufo-castanea, nitidula, an- 

 tennis, palpis, pedibus, elytrorumque apice testaceis; capite 

 thoraceque fortiter punctatis, hoc subgloboso linea media, 

 imj^unctata ; elytris fere imptmctatis. Long. corp. 1/, lin. 



Antennse yellow, about as long as head and thorax ; 

 1st joint nearly as long as the two following together, 

 2nd almost as stout as 1st; 3rd quite as long as and rather 

 more slender than 2nd; 4 — 8 each slightly shorter than its 

 predecessor, bead-like, about as long as broad; 10th qua- 

 drate, slightly larger than the intermediate joints; 11th 

 rather stouter than lOth, about as long as 9th and 10th 

 together, pointed. Head rather broader than thorax, 



• Monixta tijit'ica, n. sp. Castanea, nitidula, pedibus testaceis, anteniiis 

 basi apiccijue testaceis, medio obscurioribus, articulo dccimo levitcr trans- 

 verso ; capite crebre fortiter puuctato ; prothorace subgloboso, fortiter sed 

 obsolete punctato ; elytris tborace longioribus, obsolete punctatis. Long. 

 Corp. IJ lin. 



JIah. — Kio Janeiro. 



Closely allied to M. certa, but rather larger, with the thorax more 

 obsoletely punctured and the antennte clouded in the middle. 



