442 [June 



face of the body, the black head, hyaline wings, and the shape of the 



nietathorax. 



Genus MYRMOSA. Latr. 

 Myrmosa unicolor, Say. 



Myrmosa unicolor, Say, Long's Second Expedition, ii, p. 331. 



One % specimen. 



Fain. SCOLIAD^J. 



Genus MYZINE, Latr. 



1. Myzine sexcincta, Fabr. 



Scolia sexcincta, Fabr. Syst. Ent. p. 356 % ; Ent. Syst. ii, p. 236. 



Elis sexcincta, Fabr. Syst. Piez. p. 248. 



Myzine sexcincta, Latr. Gen. Crust, et Ins. iv, p. 112. Guer. Diet. pitt. d'Hist. 



nat. v, p. 575. 

 Tiphia maculata, Fabr. Syst. Piez. p. 224. 9 var - 

 Tiphia namea, Fabr. Syst. Piez. 233 <? . 

 Myzine namea, Latr. Gen. Crust, et. Ins. iv, p. 112. 

 Myzine similis. Guer. Diet. pitt. d'Hist. nat. v, p. 575. 

 Plesia namea, St. Farg. Hym. iii. p. 577, pi. 36, fig. 3. $>• 

 PI esia sexcincta, St. Farg. Hym. iii, p. 584 %. 

 Plesia maculata, Guer. Rev. Zool. 1838, p. 58. 

 Eight % specimens. 



2. Myzine hyalina, n. sp. 



Black: frontal orbits, clypeus, line over collar, anterior margin of mesotho- 

 rax, spot on its disk, tegulse, two spots on pleura, scutellums, marks on each 

 side of nietathorax, legs except base, and bands on abdomen, yellow; wings 

 hyaline. 



Male. — Black ; head and thorax opaque, finely punctured, clothed 

 with a thin, whitish pubescence; frontal orbits, not extending above 

 the sinus of the eyes, a spot immediately above the base of each an- 

 tenna, the clypeus, and the mandibles except tips, yellow ; antenna? 

 robust, as long as the head and thorax, opaque black above, dull rufo- 

 testaceous beneath, except the basal joint which is yellow. Thorax : a 

 line over the collar, anterior margin of the mesothorax, sometimes con- 

 fluent with the line over the collar, a subtriangular spot on the disk of 

 the mesothorax, tegulse, a large transverse spot on the pleura beneath 

 the anterior wing, as well as a small rounded spot behind it, both scu- 

 tellums, and a longitudinal, sublunate spot on each side of the meta- 

 thorax, all yellow; metathorax densely and rather finely sculptured. 

 Wings hyaline, the extreme apex slightly fuscous; nervures yellowish. 

 Legs yellow, the coxaj, trochanters and base of femora, black. Abdo- 

 men shining black, iridescent in certain lights, delicately and sparsely 

 punctured, and clothed with a short, erect, sparse whitish pubescence ; 

 the apex of the 2 — 6 segments above finely margined, with an apical 

 transverse yellow fascia on each segment, more or less deeply emargi- 



