ODYNERUS. 255 



** Posterior margin of 2d and 3d abdominal segments not rtflexed, but impressed 

 and rough. 



S3. O. Boscii Lepel. — Medius, rugosus, clypeo late piriformi, dentibus 

 2 distantibus terininato ; 0. qrvensi simillimus at clypeo minus grosse 

 punctato, metauoti cantbis superioribus acutissimis, crenatis ; niger, 

 rufo et flavo variegatus, sed pronoto saepius rufo, flavo-marginato, 

 scutello flavo- vel rufo-bimaculato, post-scutello uigro ; abdominis seg- 

 ments J 10-2°, £ 10-4° flavo-limbatis ; primo quandoque ante mar- 

 ginem rufo. 



Odyiu Boscii Lepel. St. Targ. Hymenop. II, 637, 22 % (1841).— Sauss. 



Vespid. I, 177, 69;' pi. xvii, fig. 10, % ; III, 231, J. 

 Odyn. castigatus Sauss. Vespid. I, 178, 71 (1852). 



Total lengtb, 14 mm. ; wing, 11 mm. 



?. Size, form, and puncturing of the 0. arvensis-, or a little 

 less coarsely punctured. Clypeus widely pyriform, punctuate- 

 striate, terminated by two little separated teeth. Post-scutel 

 strongly crenulate. Metathorax laterally bidentate ; its spini- 

 forrn angles situated a little lower than in the species cited ; the 

 posterior plate strongly concave, striate throughout and distinctly 

 bordered with very sharp and trenchant ridges, above all between 

 the spiniform angle and' the post-scutel ; these ridges a little 

 crenulate and terminating superiorly in a sort of tooth or rather 

 a crenulate angle separated from the post-scutel by a notch ; their 

 inner face a little rugose, punctured. 



Insect densely and rugosely punctured; the metathorax above 

 very rugose. Abdomen conic; the first segment truncate at base, 

 at a right angle, but the transverse edge rounded, not sharp. 

 Border of the 2d abdominal segment depressed, coarsely punc- 

 tured, but not reflexed; those following strongly punctured. 

 Insect black. Mouth, clypeus, spots behind the eyes, red or 

 orange ; an arc or two spots at the summit of the clypeus, one on 

 the front, and inner border of the orbits, orange ; articles 1, 2 of 

 the antenna? red or orange, with an obscure line above. Prothorax 

 red; the anterior border orange ; tegulas red, spotted with yellow; 

 spot under the wing orange or red ; clypeus black, with some- 

 what of red and two yellow spots; two orange spots at the summit 

 of the metathorax; segments 1, 2 of the abdomen bordered with 

 yellow; the border of the first widened on the sides ; this widen- 



i In place of Long. = 0.018, read: = 0.012. 



i 



