(243 ) 



sntnral dot, dilated to sevpiith stripe behind middle; couiiected with the small 

 jqiieal spots; ])ygidinra sliorter, with sliorter teeth, brown, marked at each side with 

 a narrow grey vitta. 



Hab. Miuas Geraes. 



1 ?. 



3. Gymnognathus marianna spee. nov. 



S. Similar to G. viciniis (1855) Jck. A broad red vitta over rostrum and 

 head, not divided on head ; mesial vitta of pronotnm broader than in ricinux, 

 only one lateral vitta above lateral carina ; this lateral vitta very narrow, oblinne, 

 extending from basal angle to disc ; angle of carina 90', very feebly rounded. 

 Elytra long, a cross-shaped sntural patch clayisli grey, with brown central 

 dot, dilated at the base sidewards to shoulder ; a spot in apical angle. Basal 

 abdominal segment without the creamy white lateral spot present on segments 

 2 to 4. Antenna reaching base of elytra. Pronotum densely plicate-reticulate. 



Length, 7 mm. 



Hab. Jatahy, Goyaz. 



1 (?. 



4. Gymnoguathus ada spec. nov. 



(J?. Pygidinm liidcntate : anal ventral segment rounded. Brown. Rostrnm 

 dilated at apex, nearly twice as long as broad in middle, depressed longitudinally, 

 with strongly marked mesial carina, extending over the fVons. This carina is joined 

 at each side at base by an oblir^ue carina (sometimes double), reaching backwards 

 to occijiut, which is brown, witli a thin mesial and a broader lateral clay vitta. 

 Prothorax conical, a very little broader than long, with a longitudinal mesial 

 depression which narrows apicad and is filled in with a clayisli vitta ; laterally 

 on disc an interrnjited line neither reaching apex nor carina, and close to it 

 from middle to basal angle another line, both clayish, a third line lateral, broader, 

 reaching from base to ajiex, merged together with the second at base, and only 

 imperfectly separated from the cla_\ ish area of the prosternum ; dorsal carina 

 biconvex, flexed forward at sides in an almost even arch. Elytra similar to those 

 oi' ancora, third interspace tiuely costate behind along third stripe of punctures; 

 clayish grey area reaching close to apical declivity, deeply sinuate laterally 

 before end, including a brown dot before middle of suture ; an apical spot, connected 

 along suture with dorsal area and some long lateral lines clay, no lateral dot. 

 Pygidium clay, with a brown mesial vitta which is divided by a thin grey line ; 

 teeth prominent. 



Underside clayish grey, sides yellowish clay, this pubescence forming four 

 sharply marked rounded spots on abdomen encircled with brown ; a spot on 

 metasterual episternum brown. Legs rnfescent brown, tarsi brown-black. 



Length, 4^ to 9i mm. 



J/tib. Jatahy, Goyaz. 



A series. 



5. Gymnognathus blanca spec. nov. 



cj ?. Similar to ath, pubescence less clayish and the markings more extended ; 



oceijiut with two small brown spots ; grey vittae of pronotum broader than in cu/a, 



lateral abbreviated one merged together with the grey ventral area ; grey sntural 



area of elvtra extended to lateral margin at shoulder and before middle, and more 



