10 PROCEEDINGS OP THE NATIONAL MUSEUM vol.75 



The first three or four segments of the flagellmn and the terra inal 

 1 are for the most part ferruginous. The segments of the flagel- 

 lum gradually increase in diameter from the first to the eleventh; 

 the twelfth is conical, scarcely curved, and roundly pointed. The 

 radial cell is distinctly infimiated, the remainder of the wing very 

 slightly so, particularly in the mid-region. 



Allotype (female). — The allotype resembles very closely the type 

 in the general pattern of the maculations but the yellow and ferru- 

 ginous are much more extensively developed. With the exception 

 of a pair of spots above the base of the antennae the entire frons up 

 to the level of the anterior ocellus is yellow. The prothorax is 

 yellow and ferruginous ; there is a yellow fascia on the scutellum and 

 also one on the metanotum. On the scutum there is a pair of ob- 

 scure ferruginous discal stripes and on the metapleura a small yel- 

 low spot and two ferruginous spots. The dorsum of the propodeum 

 bears an obscure ferruginous curved fascia ; the antennae are lighter 

 than those of the type, the flagellum being ferruginous below 

 throughout its length. As in the case of the type the radial cell 

 is infumated but elsewhere the infumation of the front wing is less 

 pronounced than in the case of the wing of the type. 



The clypeus of this species is distinctly six-sided and is twice as 

 wide as long dorso-ventrally. The frons is wider on the allotype 

 than on the type and the inner eye-margins on both are approxi- 

 mately parallel. The head (except the eyes), the thorax, the pro- 

 podeum, and the first segment of the abdomen are covered with 

 thickly set, moderately long, white pubescence, which is better de- 

 veloped on the allotype than on the type. The scutellum of the 

 allotype bears an evident medial pit studded with short white 

 pubescence. 



Length 20 mm. Described from two specimens, a male from San 

 Diego County, Calif., collect-ed by Mr. Coquillett, and a female from 

 Florence, Ariz. 



Type (male).— Cat. No. 40847. U.S.N.M. Allotype in the col- 

 lection of the Academy of Natural Sciences of Philadelphia. 



Genus STIZOIDES Guerin 



Figures 5, 6 



Stizoides Gxjerin, Incon. du Rejrne Anim., 1844, p. 438. 



mizm Patton, Bull. U. S. Gecl. Surv., vol. 5, 1879, p. 346.— Ceesson, Synopsis, 

 1887, Supp. vol. Trans. Amer. Ent. Soc, pp. 115 and 278.— Handlirsoh 

 (part), Sitz Akad. Wissensch. Wien, Math.-Nat. 01., vol. 101, 1892, p. 26.— 

 Fox (part). Proc. Acad. Nat. Sci. Phila.. 1895, p. 266.— Kohl (part), Ann. 

 des K. K. Naturhist. Hofmus., vol. 11, 1896, p. 421.— Dau.a Toree (part), 

 Cat. Hym., vol. 8, 1897, p. 519. 



Genotype. — Larra fasciata Fabricius {Stizus calopteryx Hand- 

 lirsch), by present designation. 



