MONTEZTJMIA. — UHTNCHITTM. 351 



c? similar, but smaller; a triangular spot at the base of the 

 clypeus, another above it, and a minute spot in the emargination 

 of the eyes yellow ; the yellow markings on the anterior tibiae and 

 on the abdomen absent. 



Hab. Tenasserim. $ Length 16; exp. 30 mm. 6 Length 12; 



e.Tp. 24 mm. 



622. Montezumia impavida, n. sp. 



9 . Head, thorax, and abdomen punctured, the punctures fine, 

 sparse and shallow on the head and thorax, somewhat denser and 

 deeper on the abdomen ; clvpeus broadly pyriform, convex, flat in 

 the middle, the apex lightly emarginate : raesonotum with a Jongi- 

 tudinally-impressed line on the disc; median segment divided 

 down tlie middle by a broad furrow ; petiole of abdomen with a 

 medial shallow furrow on its apical half. Black, shming ; a si)ot 

 at the base of the mandibles, the clypeus, a wedge-shaped spot 

 above it, the scape of the antennae in front, a line on the inner 

 orbits entering the emargination of the eyes and running to the 

 vertex, a broad hue behind the eyes not reaching the vertex, tlie 

 sides of the pronotum broadly but not reaching the posterior 

 an^es a spot at the base of the mesopleurse, the tegula?, a spot 

 in front and another behind them, two parallel longitudinal lines 

 on the mesonotum, the lateral angles of the scutellum, a hue on 

 the postscutellum, the apical half of the median segment, a trans- 

 verse band on the apical margin of the petiole, a much JDroader 

 band deeply emarginate in the middle anteriorly, on the 2nd 

 addominal segment, a narrow band on the apical margin of the 

 3rd sec^ment this band with a small incision anteriorly on each 

 side and a square mark in the middle of the apical margins of the 

 4th and 5th segments, yellow; legs black, variegated with reddish 

 yellow : wings brownish hyaline, darker along the costal margin ; 

 nervnres dark brown, teguls with a spot of black in the middle. 



Hah. Burma (Pegu Hills) ; Tenasserim. $. Length 14; 

 exp. 27 mm. 



Genus RHYNCHIUM:. 



Vespn, pt., Fahr. Ent. Si/sf. ii, p. 2(55 (1793). 

 Polistes, pt, labr. Si/st Fiez. y. 273 (1804). 

 Ev^chium, Spinoln, Ins. Lifj. i, p. 84 (1806). 

 Oclvrenis, pt., Gidr. Voy. Bektnger, Zool. p. 503 (1^34). 

 Rhynchium, Smm. Mon. Guep. Sol. Suppl. p. 170 (18o4). 



Type, B. ocnlatum, Pabr. 



Range. Both hemispheres. 



Head variable, generally as broad as the thorax ; eyes renitorm, 

 the inner orbits being deeply emarginate ; clypeus pyriform, longer 

 than broad : mandibles long, somewhat narrow, inner margin 

 oblique with blunt teeth ; labial palpi thick, of four joints, the 

 apical ioint verv small ; maxillary palpi of six joints, basal joint 

 somewhat thick, the rest slender, basal three subequal, apical three 



