764 Mr. e. a. ELLIOTT ON the; 



This species is distinguished from all others by the extremely 

 elongate posterior margin of the head, and by the great com- 

 parative length of the petiole, which is twice as long as the rest 

 of the abdomen. 



2. MARGINALIS Schlett. 



Stephamis margincdis Schlett., p. 133, 5 . 



5 . Frons and occiput coarsely and ii-regularly rugose, a few 

 arcuations immediately behind frontal tubercles. Posterior 

 margin of head retlexed collar-like. Second flagellar joint three 

 times as long as first ; third as long as first and second together. 

 Neck indistinctly finely rugose, especially centrally; semiannular 

 finely obliquely rugose. Mesonotum centrally polished smooth, 

 anteriorly and laterally rather coai-sely transversely punctato- 

 rugose, the median line of punctures obsolete. Scutellum 

 polished smooth, with a few very conspicuous punctures. Meso- 

 pleurte almost smooth, with large, diflfuse punctures ; metapleurse 

 coarsely reticulate rugose, separated from the median segment 

 by a polished smooth sulcus, which is broad in front, narrow 

 behind. Median segment anteriorly smooth, centrally and 

 posteriorly finely transrugose, coarser towards apex, with difi'use 

 superficial punctures. Petiole basally distinctly, apically in- 

 distinctly transrugose, very little longer than rest of abdomen ; 

 second segment basally rugose, remainder of abdomen dull. 

 Terebra scarcely longer than body, white-banded before apex. 

 Hind legs with coxae distinctly transrugose between widely 

 placed scale-like rugosities ; femora polished smooth, bidentate ; 

 tibiae compressed to beyond middle. 



Entirely black ; wings slightly inf umate. Length 25 mm. 



Habitat : Bahia, Brazil. Type in Imp. Nat. Hist. Museum, 

 Berlin. 



This species strongly resembles Stephanus furcatus Lep. & Serv., 

 niger Smith, and sicktnaoini Schlett., from all of which it may be 

 distinguished — in addition to the neuration — by the reflexed 

 posterior ma.rgin of the head and the elongate basal flagellar 

 joints. The latter character, and the sculpture of the mesonotum 

 will separate it from its nearest allies, 11. coUarifer Schlett. and 

 JI. ivustneii Schlett. 



3. GLABRicoxis Eoman. 



Stephanus {Hemistephanus) glabricoxis Roman (2), p. 9, 5 . 



5 . Frons arcuate rugose, space between tubercles longitu- 

 dinally rugose ; vertex with 2-3 transcarinse ; occiput more 

 longitudinally rugose ; posterior margin of head collar-like, 

 translucent. Scape as long as second flagellar joint ; third joint 

 rather longer than first and second together, fifth slightly shorter 

 than fourth and as long as sixth. Neck transverse, apically 

 deeply emarginate, transvei-se fold broad and deep ; an oblique 

 costa runs on each side of the fold, behind which the pronotum 



