ru 



MR. E. A. ELLIOTT ON THE 



body, white-banded before apex. Hind legs with coxa3 finely 

 trans-striate between coarse ridges ; femora smooth, bidentate ; 

 tibiee compressed about to middle. 



Black ; mandibles and antennge basally and hind metatarsus 

 ferruginous ; anterior legs brown, with a tendency towards 

 rufescent. Wings entirely hyaline. 



Length 12-20 mm. ; terebra 15-24 mm. 



6 . Differs from 5 in having 3rd abdominal segment usually 

 distinctly elongate, 4th transverse or rarely quadrate. Length 

 8-1] "5 mm. 



Habitat : Brazil, Manaos, Rio Autaz. Type in National 

 Museum, Budapest. 



This species appears to be one of the most frequent in the 

 Amazon region, yet, until 1914, it had been only once taken, and 

 the S was not known. It comes close to H. Gylhidrims Westw., 

 from which it may be distinguished chiefly by the finer sculpture 

 of pro- and meso-thorax, longer terebra, and entirely hyaline 

 wings. From //. limpiclipennis Schlett., wustneii Schlett., and 

 tener Schlett., all of which it resembles, it is at once separated by 

 the simple posterior margin of the head. 



• 17. CYLiNDRicus Westw. 

 Megischus cylinclricus Westw. (4), p. 230. Stephanus cylin- 

 dricus Schlett., p. 144; Enderlein (4), p. 306, 2 '•, Roman (2), 



p. 10, 2 c?. 



2 . Head entirely finely and moderately irregularly rugose, 

 more transversely near posterior ocelli ; three anterior frontal 

 tubercles very prominent ; posterior margin of head simple. 

 Second flagellar joint fully one and a half times as long as first ; 

 third longer than first and second together. Neck coarsely 

 rugose, anteriorly transversely, posteriorly more irregularly ; 

 semiannular smooth above, lateral])'' posteriorly obliquely rugose. 

 Mesonotum rather coarsely rugose-punctate, a small central 

 smooth space with indistinct longitudinal row of punctures, the 

 lateral ones more distinct. Scutellum polished, with diffuse 

 marginal punctures. Mesopleurse shining smooth above, dull 

 and diffusely punctate beneath ; metapleurse finely and diffusely 

 punctate in front, irregularly rugose behind. Median segment 

 strongly shining, very finely and diffusely punctate, marginal 

 sulci obsolete. Petiole basally irregularly rugose, remainder 

 distinctly trans-striate, a little shorter than rest of abdomen, also 

 slightly shorter than the hind coxa?, trochanters, and femora 

 together ; second segment basally subrugose, third basally trans- 

 versely, apically longitudinally striate, rest smooth, with a few 

 dull spots due to microscopic sculpture. Terebra as long as 

 body, sheaths white-banded before apex. Hind legs with coxse 

 finely striate between coa,rse rugosities ; femora smooth, 

 bidentate ; tibiae compressed to middle. 



Black; head entirely, mandibles and antennae basally ferru- 

 ginous, hind tarsi badious. Wings slightly infuscate. 



Length 13-15 mm. 



