ODYNERUS. 1 93 



ment cribrosc 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. Antennas 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 antennas 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. 



llab. The coast of Mexico. I caught 9 % near Tampico. 



31. A. qiiadrisectius Say. — Validns, gracilis, grosse foraminato- 

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

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

 metanoti, abdominisque segmentorum, 1>, 2' limbo, albidis ; primo 

 superne albido, macula nigra ; alis nigro-violaceis. 



Oilyncrus quadrisectus Say, Bost. Journ. I, 1887, 3S5, 1. — Sauss. Et. 



Vespides, III, 20(j.'— Say's Entom. (Lb Contk), II, 765, 1. 

 Odynerus Bellone Lepel St. Farg. Hymen. 11,660,40 (1841).— SAUSS. 



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



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

 1 The variety fig. 1. e. pi. ix, fig. 9, 9 , is quite a different speoies. Comp. 



Mo nob id max Maris. 



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