390 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Encryitis sericans Nees, Iclin. AfSn. Monogr., II, p. 247, male. 



Encrytus sericens Walker, Ent. Mag., V, 1837, p. 72, female and male.— Ratze- 



BURG, Iclm. d. Forstins., Ill, 1852, p. 189, female. 

 Encrytus sericans Ratzf.burg, Iclin. d. Forstins., Ill, p. 193, male. 

 Microterys sericens Thomsox, Hym. Stand., IV, 1875, p. 156, female and male. 

 Blastolhrix sericeus Mayr, Verli. Zool.-bot. Ges. Wien, XXV, 1875, pp. 698-700, 

 female and male.— Waciitl, Wien. Ent. Zeitg., 1, 1882, p. 296.— Dalla Torrk, 

 Nat. Hym., IV, p. 253. 

 Blastothrix Jonfjipennis Howard, Eep. U. S. Dept. Agric, 1880-81, p. 366, female. — 

 Cresson, Syu. Hym. N. A., 1887, p. 239.— Dalla Torhe, Cat. Hym., V, 1898, p. 

 252. 

 Type. — Cat. No. 26 14, U.S.K.M. {longipennis Howard). 

 Habitat. — Europe; North America. 



Hosts. — Ehyucli. : Pulvinaria vitis Linnfeus; Lecanium wsculi Kollar. 

 A. common and widely distributed species. ■ 



5. BLASTOTHRIX YUCC^ Coquillett. 



Blastothrix yucca' Coquillett, West Am. Scieut., VII, 1890, p. 44. — Dalla 

 Torre, Cat. Hym., V, 1898, p. 253. 



Type.— Gat. No. 1476, U.S.N.M. 



Habitat. — California. 



Host. — Rhynch. : Fseudococeus ytiocw Coquillett. 



64. MICROTERTS Thomson. 



1875. Microterys Thomson (part), Hym. Skand., IV, p. 155 [See. B, p. 157]. 



(Type, Encyrliis syJvAus Dalman.) 



I. MICROTERYS CHALCOSTOMUS Dalman. 



Encyrtns chalcostomus Dalman, Svensk. Vet.-Akad. Handl., XLI, 1820, p. 342, 



female. — Nees, Hym. Iclm. AtiBn. Monogr., II, 1834, p. 207. ' 

 ? Encyrtus (rstirus Dalman, Svensk. Vet.-Akad. Handl., XLI, p. 365, male. — 



Nees, Hym. Ichn. AfSn. Monogr., II, p. 250. 

 Eucyrtns chalcoslomns Mayr, Verb. Zool.-bot. Ges. Wien, XXV, 1875, pp. 706, 



719, female. 

 Microterys chalcostomus Thomson, Hym. Skand., IV, 1875, p. 159. — Dalla Torke, 



Cat. Hym., V, 1898, p. 234. 



Habitat. — Europe. 



Host. — Rhyncli.: Lecanium cmculi Kollar, L. qnercus Linujieus. 



2. MICROTERYS CINCTICORNIS Ashmead, new species. 



This species probably represents a variety of the European M. tes- 

 selJatus Dalman. It agrees with it in stature and in wing markings, 

 except that the triangular white marginal spots are connected so as to 

 form an additional band, while the head and thorax at sides, too, are 

 quite difi'erently colored. The head, the pronotum, except above, the 

 sides of the thorax, and the legs, are brownish-yellow, while the 

 mesonotum is metallic blue. 



Type.—Qat. No. 4769, U.S.N.M. (Ashmead collection.) 



Habitat. — New Hampshire: Mount Washington. (Mrs. A.T.Slosson.) 



