202 ODYNERUS GRACILIS. 



metathorax rugose, with the concave posterior truncation shining, 

 and finely striated obliquely. Two united spots between the 

 antennae, a minute spot behind the eyes, a spot on each side of 

 the prothorax, two on the scutellum, and one beneath the wings, 

 yellow ; the anterior and intermediate tibia; in front and at 

 their base, the posterior pair at their base, and the basal joints 

 of the tarsi, yellow. The two basal segments of the abdomen 

 with broad yellow fascia?, the fourth with a narrow one, the 

 anterior fascia notched in the middle, the second sinuated on 

 each side. 



Male. Length 2.V-3 lines. — Differs from the female in having a 

 yellow spot on the clypeus, in usually wanting the spots on the 

 thorax, and in sometimes having the third fascia of the abdomen 

 wanting. 



Generally distributed. Specimens have been received from 

 Scotland, and I have taken it in the Isle of Wight. 



3. Odynerus gracilis. 



O. niger, punctatus ; capite thoraceque flavo-guttatis ; abdomine 

 flavo-fasciato. 



Odynerus gracilis, Brulle, Exped. Sc. de Moree, Ins. iii. t. 50. f. 3. 

 Odynerus elegans, Wesm. Mori. Odyn. Belg. 42. 7. 



St. Farg. Hym. ii. 665. 13. 



Herr. Schaff. Faun. Germ. 154. 17. 



Sauss. Mon. Guepes Sol. 124. 2. 

 Symmorphus elegans, Wesm. Mon. Odyn. Bely. Supp. 2. 9. 



Female. Length 5-6 lines. — Black, punctured ; two spots at the 

 base of the clypeus, two united ones between the antennas, the 

 scape in front, and two minute dots behind the eyes, yellow. 

 The lateral angles of the anterior margin of the prothorax very 

 acute or subspinose, the metathorax entirely rugose ; a spot on 

 each side of the prothorax in front, a spot beneath the wings, 

 the outer margin of the tegulse, two spots on the scutellum, the 

 tibite and anterior tarsi, yellow ; all the tibiae with a black stain 

 behind, the tarsi more or less fusco- ferruginous, with the tips 

 of the femora yellow ; wings subhyaline, slightly smoky ante- 

 riorly. The first and second segments of the abdomen with 

 broad yellow fasciae sinuated on each side anteriorly, the third 

 and fourth fasciae much narrower; the abdomen shining, its 

 basal segment strongly punctured, its apical margin thickened 

 and elevated. 



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