1^-1 1 35' 

 550. 



ACALLES ROBORIS. 



Order Coleoptera. Fam. Curculionidte, 



Cryptorhynchldae Scho. 



Type of the Genus, Curculio Ptinoides Marsh. 



AcALLES Schb. — Tylodes Scho., Curt. — Cryptorhynchus Curt. — 



Rhynchaenus Gyll. — Curculio Marsh. 



AntenneB inserted in a groove on the side of the rostrum about 

 the middle, geniculated, 12-jointed, basal joint about half the 

 length of the remainder, stout and clavate, 2nd and 3rd elongated, 

 the former the longest and stoutest, 5 following subquadrate, 

 8th the largest and rather funnelshaped, the remainder form- 

 ing a short ovate club, pubescent at the apex (6). 

 Mandibles somewhat trigonate, convex inside at the base, bifid 

 at the apex (2). 



Maxillce produced on the inside and ciliated with stout blunt 

 bristles. Palpi short and triarticulate, basal joint stout some- 

 what quadrate, 2nd small, 3rd slender and rounded at the apex 

 (3). 



Mentum long and narrow, dilated at the base and apex, which 

 last is bisinuated. Palpi small and triarticulate, basal joint 

 ovate and a little the stoutest, 3rd the smallest (4). 

 Rostrum received into a groove in the breast, as far as the anterior 

 cox(E ; a little arched and slightly narroioed at the middle : head 

 globose but concealed 7iearly to the eyes which are small lateral and 

 ovate. Thorax subglobose, truncate at the base, a little produced 

 before and sinuated behind the eyes : scutellum none. Elytra con- 

 nate, globose, a little tapering to the apex, the sides inclosing the ab- 

 domen. Wings none. Legs rather short : thighs rather elongated 

 and slightly notched beneath towards the apex: tibiae shorter, notched 

 at the apex and producing an incurved spine : tarsi short, 4-jointed, 

 basal joint a little longer than the 2nd which is subcordate, 3rd bi- 

 lobed, 5th slender and clavate : claws minute curved and acute (5, a 

 fore leg). 



RoBORis Curt. MSS. — Guide, Gen. 346. 3. 



Piceous, clothed with cinereous-ochre scales, somewhat erected, 

 rostrum naked, shining and ferruginous, base yellow, with scales, 

 antennae ferruginous; crown of head blackish, as well as 2 

 slightly elevated tufts of scales on the fore part of the thorax, 

 the back of which is deeply channelled and flattened, forming a 

 subcordate blackish space, elevated in front with 2 spots of ci- 

 nereous scales, sides yellow variegated with ochre, with a slight 

 tubercle on each beyond the middle : elytra strongly striated 

 with deep little fovese, the interstices elevated, especially the 

 2nd and 4th at the middle, and the 3rd and 5th at the base and 

 towards the apex, forming 6 elevated oblong black spots of 

 scales on each, an irregular dark band extends across the mid- 

 dle : legs annulated with brown. 



In the Author's Cabinet. 



