, hymenoptera. 275 



4. Stelis breviuscula. 



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

 Hab. Sweden. 



5. Stelis 8-maculata. 



Stelis octomaculata, Smith, Zool. iii. 1155. 3 c? 5 . 

 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-hyahne, 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 



