genera and species of Buprestidce. 181 



The four species which I propose to associate, although 

 differing in the length of the posterior tarsi, appear to 

 me to form a natural group, for which it is convenient 

 to have a name as distinct from Agrilus. 



Autarcontes planus, n. s. 



Elongatus, sat latus, dorsim planatus, seneo-niger, svibtus 

 cyaneus ; elytris ante apicem guttulis numerosis griseis ornatis. 

 Loug. 13 — 14 mm. 



Black above, slightly tinted with aeneous (sometimes with violet). 

 Forehead deeply incised between the eyes. Thorax twice as broad 

 as long, broadest just before the base, narrowed anteriorly ; rather 

 flat above, with a shallow double impression at the base ; obliquely 

 declivous at the sides and irregularly impressed ; irregularly and 

 not very closely punctured. Scutellum gently concave, smooth ; 

 transverse, with the middle of the posterior margin produced into 

 a point. Elytra flat on the back, and very closely punctured ; 

 sides beyond the costa, and the apex more shining and less closely 

 and more irregularly punctured. A few small greyish spots are 

 scattered over the surface, but in the apical region they are more 

 numerous. The apex of each elytron is truncate, slightly sinuate, 

 the outer angle very acute. Prosternal process and metasternum 

 strongly punctured ; the abdomen much less strongly punctured. 

 Posterior tarsi short. 



Hab. Para and Nauta, Amazons (Bates) ; Bahia. 



Autarcontes pictiventris, n. s. 



Statura A. mucorei, KL, magis tamen elongatus, depressus, 

 niger, opacus ; elytris pube grisea irroratis ; corpore subtus cyaneo, 

 nitido, abdomine maculis coccineis utrinque ornato. Long. 18 mm. 



Thorax short and broad, obliquely narrowed in front, flattened 

 (or very slightly concave) on the disk, declivous and impressed at 

 the sides ; the angle at the side near the base is very prominent 

 and very acute. Elytra relatively much longer than in A. 

 mucoreus, flattened dorsally ; densely punctured ; with numerous 

 vermiculate greyish marks ; two bands behind the middle and the 

 apex are almost without spots. The red spots on the last three 

 segments of the abdomen are quadrate, with an oval smooth space 

 at the base. The apex of each elytron is truncate and slightly 

 emarginate ; the outer angle acute. Posterior tarsi rather long. 



Hab. Amazons, Santarem. 



