ODYNERUS. 193 



mcnt cribrose with punctures of a little less size than those of the 

 thorax, its suture distinct; near to its border, a badly marked 

 depression. The remainder of the abdomen less strongly and 

 densely punctured ; the punctures throwing forth some short, 

 gray hairs. 



Insect black. Antennae ferruginous above. Mandibles before, 

 borders of the summit of the clypeus, two little lines toward its 

 base, a dot on the forehead, scape of the antennae before, border 

 of the prothorax, a large spot beneath the wing, a dot on the 

 wing scale and its posterior appendix and post-scutel, of a pale 

 yellow. One sees in addition, six yellow spots on the metathorax, 

 two at the sides of the post-scutel, two on the angles of its 

 posterior plate, and two lines at the top of its concavity. Segments 

 1, 2, ornamented with a border of the same color, narrow, sub- 

 marginal, and at times interrupted on the 2d segment; the first 

 adorned in addition with two lateral dots which at times join 

 themselves to the border. Legs black, tarsi brownish, anterior 

 tibiae yellow before. Wings of a transparent brown with beauti- 

 ful violet reflections. 



%. Clypeus bidentate, yellow, with a very fine black edging 

 all around it. Vertex with no hairy tubercles. A pale yellow 

 spot on the front. Hook of the antennae brownish. 



Var. The yellow markings more or less extended ; the border- 

 ing of the prothorax interrupted, and the concavity of the meta- 

 thorax bordered with whitish. 



Hab. The coast of Mexico. I caught 9 $ near Tampico. 



31. .4. qtiadrisectus Say. — Validus, gracilis, grosse foraminato- 

 punctatus ; clypeo apice truncato ; corpore albido-variegato ; maculis 

 2 inagnis pronoti, macula subalari, post-scutello, maculis 2 magnis 

 metanoti, abdominisque segmentorum, ]', 2' limbo, albidis ; primo 

 superne albido, macula nigra ; alis nigro-violaceis. 



OJynerus quadrisectiis Say, Bost. Journ. I, 1837, 385, 1. — Sauss. Et. 



Vespides, III, 206. '—Say's Entom. (Le Conte), If, 7G5, 1. 

 Odynerus Bellone Lepel St. Farg. Hymen. II, 660, 40 (1841).— Sapss. 



Et. Vespid., I, 146, 32, pi. xvi, fig. 10, £. 



Total length, 20 mm. ; wing, 16 mm. 



1 The variety fig. 1. c. pi. is, fig. 9, J , is quite a different species. Comp. 

 Monohia maxiUaris. 



13 



