ZETIIUS. 31 



Feet black; tarsi ratber ferruginous. Wings transparent, clouded, 

 yellowish-brown, with the nervures brown — their reflection 

 golden-gray. 



%. Anterior border of the clypeus notched as in the female; 

 the angles of the indenture in the form of teeth, the middle tooth 

 smaller than the lateral. All the clypeus covered with a silvery 

 down; its lower moiety of a yellow color, as well as a line upon 

 the scape of the antennae. Mandibles yellow in front, the end of 

 the antennae black, the hook elongate, edged, and sharp ; the 

 terminal joints sometimes a little rolled up. 



Bess. a. diff. — It is a little smaller than Z. Westwoodi, and is 

 distinguished from it by its more swelled and more coarsely punc- 

 tured petiole, by its more indented, more strongly punctured 

 clypeus, etc. It has the form of Z. spinosus, but it has no post- 

 scutellar spine, etc. ; and although rather coarsely punctured, 

 that is really less so than tins species. 



llab. Mexico, on the gulf side. Tampico. 



Fig. 1. The male enlarged. Fig. 1, a. The head of the male seen from 

 before. 



Observation. — The figure 1 is not entirely satisfactory: the bead not 

 sufficiently thick, and the second abdominal segment with the pedicle a 

 little too long. 



23. Z. Otomitus n. sp. — Niger, dense punctatus ; capite et thorace 

 cinereo-, abdomine fulvo-hirto; antenuis nigris, scapo linea iiava ; 

 punctis' 2 frontalibus, pronoti margine, fascia post-scutelli, abdominisqne 

 segmentorum 1-3 linea marginali, flavis ; petiolo ovato-tumido nitido, 

 punctato, apice truncato, supeme impressione transversali ; genibus et 

 tarsis fuscescentibus; alis fusco-aureo nebulosis. — £ clypeo trapezino, 

 fascia submarginali llava. 



Total length, 14 mm. ; wing, 10 mm. 



%. Quite the same form and punctuation as Z. azfecus. But 

 (lie clypeus not square, more triangular, wide interiorly, narrowed 

 at the summit, or rather in the form of a half circle, a little eon- 

 vex, densely punctured; the inferior margin wide and transverse; 

 with a wide transverse emarginal ion and two little teeth. A pale 

 yellow band occupies the inferior part, but the extreme margin 

 is black. The (lagelhim of the antennae quite black; only the 

 hook is sometimes brown beneath. The lateral carinas of the 

 metathorax a little more pronounced ; the petiole not so coarsely 

 punctate, a little wider behind, more truncate, somewhat as in 



