?82 



MR. E. A. ELLIOTT ON THfi 



FcENATOPUS Smith. 



This subgenus was erected in 1860 by Smith, to inckide all 

 those species of Stejyhanii^s having reduced venation, but was 

 restricted by Enderlein (Zool. Anz. xxviii. 1906) to those having 

 only the basal cells complete, and a portion of the median nervure 

 beyond the transverse nervure representing the upper boundary 

 of the submedian cell. In Diastepharius this part of the median 

 nervure is either entirely wanting or reduced to a mere stump. 

 Although these subdivisions of the Stephanidfe may be said to be 

 purely artificial, yet, since some of them appear to be confined to 

 certain regions, and no transition forms are known, they seem to 

 be founded on permanent differences, and are of the highest value 

 in identifying the numei-ous species. 



The number of teeth on the hind femora and the length of the 

 petiole as compared with tiie rest of the abdomen, and, in the $ , 

 the length and colour of the terebra and its sheaths, are among 

 the best characters for difl;erentiation. 



Table of Species. 



(25.) 1. Hind femora bidentate. 



(16.) 2. Petiole distinctlj'longer or shorter than rest of abdomen. 

 (12.) 3. Petiole distinctly longer than rest of abdomen. 

 (5.) 4. Sheaths of terebra black ; head arcuate striate ... 1. ocellatus 'EiWoii. 

 (4.) 5. Sheaths of terebra pale-banded before apex. 



(7.) 6. Sheaths of tei'ebra white-banded 2. wwiicMs Westw. 



(6.) 7. Sheaths of terebra yellow-banded. 



(9.) 8. Terebra only as long as bodjr 3. sumbanus Enderl. 



(8.) 9. Terebra much longer than body. 

 (11.) 10. Mesopleurse closely punctate; 2nd segment basally smooth 



and shining A. formosanus Enderl. 



(10.) 11. Mesopleura; very diffusely punctate; 2nd segment basally 



granulate and dull 5. s«?ca^icoZZis Enderl. 



(3.) 12. Petiole distinctly shorter than rest of abdomen. 

 (14.) 13. Terebral sheaths ferruginous, broadly yellow-banded, apex 

 black. Head pale marked; middle tibise and hind meta- 

 tarsus white 6. anwM^JtorsJs Enderl. 



(13.) 14. Terebral sheaths not yellow-banded ; vertex transrugose. 

 (15.) 14 a. Sheaths ferruginous, apex black ; mesonotum irregularis' 

 coarsely rugose; scutellum smooth and shining; metapleurae 

 and median segment alutaceous, separated by a carina. [Schultz. 



7. fernandopoensis 

 (14a.) 15. Sheaths brown, apex black ; mesonotum and scutellum 

 denselj' rugose-punctate, latter with central smooth space ; 

 metapleurae and median segment densely superficially 



punctate, not separated 8. schlettereri Enderl. 



(2.) 16. Petiole about as long as abdomen. 

 (18.) 17. Pronotum very short, densely rugose-punctate; terebra 



shorter than body, sheaths yellow-brown 9. brevicollis T^nderl. 



(17.) 18. Pronotum not verj'^ short. 

 (22.) 19. Pronotum normal. 



