8 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.68. 



The types were reared by Prof. F. M. Webster from the eggs of 

 Fidia viticida on grapevine. I do not know the host of Mr. SHnger- 

 land' s specimens. 



2. FIDIOBIA RUGOSIFRONS Crawford. 



Fidiobia rugosifio7i$ Crawfoed, Ins. Inect. Menst., vol. 4, 1916, p. 141. 



Closely allied to F. flavipes Ashmead from which it differs in its 

 slightly larger size, more pronounced coloring, and coarser sculpture. 

 Female. — Length 0.90 mm. Differs from the corresponding sex in 

 Jlavipes in the following manner: Body of a shining black color; 

 antenna] club dark brown; the head and most of the 

 thorax, the scutellum excepted, covered with a fine 

 thimble-like sculpture; fourth antennal joint dis- 

 tinctly shorter than the third. 



Male.- — Length 0.80 mm. Similar to the female. 



Differs from the male of jiavipes in the antennal 



structure, which difference can be readily noted by 



comparing the accompanying figures. 



Type locality. — Montourville, Pennsylvania. 



Type.—Q2it. No. 20786, U.S.N.M. Female and 



Fig. 3. — Fidiobia rnale 



RUGOSIFRONS CRAW- 

 FORD. ANTENNA^oF Dcscrlbed from types which bear the additional 

 MALE. Scape not data, " reared from eggs in wheat stubble; P. R. 



SHOWN. ' ^'^ 



Myers, Coll.; emerged Apr. 17, 1916." 

 Mr. Crawford was mistaken in taking both of his specimens for 

 females. His mistake was not surprising, however, since his accuracy 

 was unquestioned until the antennae of both specimens had been 

 mounted and compared. 



III. Genus AMITUS Haldeman. 



Amitus Haldeman, Amer. Journ. Sci.,ser. 2, vol. 9, 1850, p. 109. (Monobasic.) 



Genotype. — A. aleurodinis Haldeman. 

 Zacrita Foerster, Kleine Monographie, 1878, p. 46. (Monobasic.) Genotype. — 



Z. longicornis Foerster. 



Head transverse; occiput not margined ; lateral ocelli as near to the 

 eye margin as to the front ocellus; antennae in female ten-jointed, 

 with the last three joints closely united and forming a club; scape 

 curved, not especially long; joints three, four, and five rather elongate, 

 several times longer than wide; antennae in male ten-jointed, filiform, 

 with all the flagellar joints longer than wide and densely covered with 

 short erect hairs; scape strongly bowed, not long or thick; fourth 

 joint cylindrical, not deformed in any w^ay; thorax more or less flat- 

 tened above, wider than high; mesonotum large; pronotum narrow 

 seen from above; notauli complete or incomplete; scutellum flat- 

 tened or convex, unarmed; median episternal groove deep, curved; 



