27 G Mr. D. Sharp's Contributions to the 



sides ; tlie thorax also is indistinctly carinate along the 

 middle. In other respects it extremely resembles E. 

 hoops. 



Tapajos ; a single individual of unknoA^^l sex. 



3. Ecliiaster signatus, n. sp. Elongatus, angustulus, 

 castaneo-testaceus, elytris fusco-nigrosignatis ; crebre for- 

 titer punctatiis; capite elongato, vertice angusto. Long. 

 Corp. 2^ lin. 



Antennaj yellow, rather longer than the head, a little 

 thickened towards the extremity ; 3rd joint much narrower 

 but almost longer than 2nd ; 4th and 5th joints slender, 

 nearly equal to one another, each rather longer than 

 3rd; 8 — 10 bead-like, scarcely broader than long; 11th 

 rather broader, and a good deal longer than lOtli, 

 ending in a seta-like spine. ISlandibles reddish, very 

 elongate and slender, each Avitli two teeth, of which 

 the upper one is very long. Labrum Avith two sharp, 

 stout, triangular, a])proximate teeth in the middle, and on 

 each side these with a smaller sharp projection. Head 

 longer than broad, reddish, gradually narrowed from the 

 eyes to the vertex, densely punctured ; the punctures rough 

 and asperate, except on the front part. Thorax elongate 

 and narrow, only half as broad as the elytra, twice as long 

 as broad ; its greatest width about the middle, thence a 

 good deal narrowed tOAvards the fi-ont and slightly towards 

 the base, dull, reddish in colour, densely punctured. Kly tra 

 only slightly longer than thorax, yelloA\4sh, but with four 

 large longitudinal marks towards the extremity (often 

 more or less confluent), leaving a basal fascia pale, which, 

 however, is subinterrupted in the middle by the extension 

 forwards of the dark markings ; densely and roughly 

 punctured. Hind body elongate, slender and greatly 

 ])ointcd, obscure yellowish ; the basal segments rather 

 coarsely and asperately punctured, the apical ones very 

 finely and indistinctly. Legs pale yellow ; vmder surface 

 chestnut-yellow, coarsely ]iunctured. 



Tapajos ; eleven individuals. 



On dissecting one of these specimens I find it to be a 

 male, though there are no external characters to indicate 

 this, and the aedeagus is small and inconspicuous. 'J'he 

 black marks on the elytra vary a good deal in their 

 extent. 



4. Ecliiaster carinatus, n. sp. Elongatus, angustulus, 

 testaceus, elytris fuscis, basi tcstaceis;. dense punctatus. 



