ZETHUS. 21 



lO. Z. Westwoodi Sauss. — Niger, oapite et thorace grosse foraminato- 

 cribratia , raetanoto argenteo-sericeo ; abdomine valde aureo-sericeo ; 



petioli ampliatione ovata, elougata, Laud clavata; secundo seginento 

 petiolato; pronoti margiue, macula subalari, scutellis, et abd. segmen- 

 toruin 1-2 margiue, flavis; alis infuscaiis ; 9 tlvpeo integro utrinque 

 margiue rlavo ; £ clypeo flavo, auteuuis subtus et cochlea fulvis. 



Ztthus Westwoodi Sauss. Vespldes, I, 1852, lb', 15; III, pi. vi, fig. 2, 9. 

 Total length, 18 mm. ; wing, 13 mm. 



9. Clypeus polygonal, entire, covered with coarse punctures; 

 its inferior border a little truncated and retrousse. Head and 

 thorax covered with coarse cribriform punctures; on the forehead 

 a feeble transverse depression, and above the insertion of each of 

 the antennas a vertical medial depression extending to the clypeus. 

 Prothorax angulate; its anterior border edged by a crest in form 

 of a vertical lamina. Post-scutel unarmed. Metathorax rounded, 

 smooth, hairy, with little or no punctuation, and covered with a 

 silky down, in color strongly silvery or a little golden ; its exca- 

 vation has its upper edges moderately distinct; the lateral edges 

 of the metathorax prominent. Petiole smooth, shining, gulden, 

 like the abdomen : the linear part almost naked, the expansion 

 much lengthened, oval, occupying most of its length, a little 

 swelled above. The remainder of the abdomen shining, distinctly 

 golden, garnished with a silky pile, having cupreus reflections. 

 Second segment ovate-globular, pediculate, the pedicle occup}nng 

 a fifth of the length of the segment; the part swelled (or the 

 bell), wider than long, but less wide than the length of segment; 

 the second leaf of its border very prominent. 



Insect black; on each side of the clypeus an oval spot, two 

 dots above the insertion of the antennas, margin of the prothorax, 

 a spot under the wing and scutels, yellow or orange. A border 

 of this color occupies the margin of the two first segments; that 

 of the first extending along the sides of the petiole (these mark- 

 ings are liable to be wanting, particularly on the head and the 

 prothorax). The remainder of the abdomen and the second 

 margin of the second segment, ferruginous. Antennas and legs' 

 black. Wings smoky, the anterior borders browu with a violet 

 reflection. Wing scales yellow or brown. 



The % as large as 9 ; clypeus yellow, slightly bidentate (a 

 third hardly perceptible tooth between the two laterals). Fla- 

 gellum of the antennae yellow beneath, especially under the 



