8 MISC. PUBLICATION 241, U. 8. DEPT. OF AGRICULTURE 
(2) ARIDELUS NIGRITHORAX, new species 
Distinguished from jfishert and melanderi by its entirely black 
thorax. 
Female.—Length 3.8 mm. Head, as seen from above, subquadrate; temples 
and cheeks broader than eyes; malar space half as long as eye; face broad, minutely 
punctate; frons, vertex, temples, cheeks, and occiput polished; ocelli separated 
by slightly more than the diameter of one of them; first flagellar segment nearly 
as long as scape and pedicel combined, the following shorter. 
Thorax short and stout, mesonotum and propodeum coarsely reticulate; 
mesopleurum covered with large shallow punctures; radius originating slightly 
beyond middle of stigma; first abscissa of radius much longer than second but 
ess than half as long as first intercubitus; calcaria of posterior tibia about one- 
third as long as metatarsus. 
Abdomen entirely polished, much narrower than thorax; the first segment 
nearly as long as remainder of abdomen; ovipositor sheaths very short and rather 
broad, not extending beyond apex of abdomen. 
Head and abdomen testaceous; thorax black or blackish; stemmaticum and 
antennae black; legs testaceous, with apices of posterior tibiae, and their tarsi 
entirely, fuscous; wings very weakly infumated; stigma and veins brown; ovi- 
positor sheaths black. 
Type locality —Kerrville, Tex. 
Type.—United States National Museum no. 49907. 
Described from two female specimens: The type collected by 
F.C. Pratt, Bureau of Entomology, May 30, 1906; the paratype taken 
by H. H. Smith at Rosslyn, Va. 
(3) ARIDELUS FISHERI (Viereck), new combination 
(Figs. 1, C; 2, J) 
Helorimorpha fisheri Viereck, Ent. News 20: 290, 1909. 
Type.—In the United States National Museum. 
This form, which seems to differ from melanderi only in its entirely 
yellowish head, and from nigrothorax only in its yellow thorax, is the 
most common Nearctic species. In the collection of the United 
States National Museum there are 36 specimens from various localities 
in Virginia, Maryland, Pennsylvania, the District of Columbia, 
Kentucky, Alabama, Kansas, and Texas. 
The Genus METEORUS Haliday 
ene Haliday, Ent. Mag. 3: 24, 1835. (Genotype, Ichnewmon pendulator 
atreille.) 
Protelus Foerster, Verhandl. Naturh. Ver. Preuss. Rheinlande 19 (N. F. 9): 2538, 
1862. (Genotype, Perilitus chrysophthalmus Nees.) 
Zemiotes Foerster, Verhandl. Naturh. Ver. Preuss. Rheinlande 19 (N. F. 9): 2538, 
1862. (Genotype, Perilitus albitarsis Nees.) 
Perilitus Foerster (not Nees), Verhandl. Naturh. Ver. Preuss. Rheinlande 19 
CNET 9) 2538862) 
Saprotichus Holmgren, Kongliga Svenska Fregatten Eugenies Resa Omkring 
Jorden . . ., p. 430, 1868. (Genotype, Saprotichus chinensis Holmgren.) 
Pachythecus Cameron, Soc. Ent. 27: 84, 1912. (Genotype, Pachythecus ruficeps 
Cameron.) (New synonymy.) 
In an earlier paper (1/3) the writer has discussed this genus and has 
reviewed the North American species. Accordingly, a detailed 
treatment of the group will not be repeated here. As noted above, 
Pachythecus Cameron has been found to be an additional synonym 
of Meteorus. The genotype, which is in the British Museum of 
Natural History, has been recently examined and found to be ob- 
viously congeneric with the genotype of Meteorus. 
