HYMENOPTERA. 275 



4. STELIS BREVIUSCULA. 



Stelis breviuscula, Nyland. Ap. Boreal. Supp. p. 106. 

 Hab. Sweden. 



5. STELIS S-MACULATA. 



Stelis octomaculata, Smith, Zool. iii. 1155. 3 <$ $ . 

 Stelis ornatula, Nyland. Ap. Boreal. Supp. p. 106. 



Hab. Britain; Sweden. 



6. STELIS ABERRANS. 



Stelis aberrans, Eversm. Bull. Mosc. xxv. 87. 3. 

 Hab. Russia. 



7. STELIS OBESA. 



Stelis obesa, Say, Bost. Journ. Nat. Hist. i. 398. 

 Hab. North America (Indiana, United States). 



8. STELIS FCEDERALIS. B.M. 



Female. Length 2i lines. Black, the face covered with 

 griseous pubescence, the flagellum rufo-piceous ; the thorax as 

 well as the head strongly punctured, the former has a scattered 

 griseous pubescence, the wings fusco-hyaline, the apical margins 

 of the wings faintly clouded, the apical joints of the tarsi dark 

 ferruginous. Abdomen ovate, shining and closely punctured, 

 the basal segment having on each side a somewhat pear-shaped 

 yellowish-white macula ; the four following segments have across 

 the middle a slightly interrupted narrow fascia, the sixth imma- 

 culate, its margin entire, rounded. 



Male. Closely resembling the female, the face being more 

 densely pubescent; the five basal segments of the abdomen 

 having a subinterrupted fascia of the same colour as in the 

 female, the fasciae on each side are sinuated on their inferior mar- 

 gins ; the apical segment rounded. 



Hab. United States. 



9. STELIS CARBONARIA. B.M. 



Female. Length 4 lines. Black, closely and strongly punc- 

 tured, the head and thorax opake ; the abdomen shining, more 

 finely and distantly punctured, the face covered with white pu- 

 bescence; wings dark fuscous, palest towards their base; the 

 scutellum rounded, and produced behind over the base of the 

 abdomen and covered with large punctures ; in the middle of the 



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