18 MISC. PUBLICATION 341, U. 8. DEPT. OF AGRICULTURE 
tures of this species. The apical portion of the spermatheca varies 
considerably in length and curvature, the one figured (fig. 4, F’) be- 
ing probably of about average shape. 
The 90 specimens of taeniatulus examined are all females and it is 
probable that the species is parthenogenetic. Most of the specimens 
were collected in September, a few in August and November. A 
specimen from Pensacola, Fla., was collected on beggarweed, and 
several from Wiggins, Miss., on goatweed. 
In the material at hand are two specimens from Buenos Aires, and 
one from San Pedro, Argentina. These are of the vittate form and, 
though they do not agree very well with Berg’s description of 
taeniatulus, they are very similar to his figure, and the writer believes 
that they belong to this species. As indicated above, most of the 
United States specimens are nearly immaculate, or at most indis- 
tinctly vittate. Both vittate and nonvittate specimens were collected 
at Pensacola, Fla., in 1937. 
The type specimen of texanus was collected in 1906, the paratype in 
1907. Unless there have been subsequent introductions, taeniatulus 
has therefore been present in this country for at least 32 years. 
Subgenus ASYNONYCHUS Crotch 
Asynonychus Crotch, Zool. Soe. London Proce. 1867: 388; Champion, Ent. Mo. 
Mag. 58: 162, 1922; Leng, Catalogue of the Coleoptera of America North 
of Mexico Sup. 1, p. 47, 1927; Bradley, Bull. Brooklyn Ent. Soc. 25: 262, 
1930. | 
Aramigus Horn, Amer. Phil. Soc. Proc. 15: 938, 1876: Henshaw, List of the 
Coleoptera of America, North of Mexico, p. 155, 1885; Sharp, Biologia Cen- 
trali-Americana, v. 4, pt. 3, p. 167, 1891; Champion, ibid., pp. 232, 333, 334, 
1911; Pierce, Jour. Econ. Ent. 3: 361, 1910; Pierce, U. S. Natl. Mus. Proce. 
45: 416, 1913. 
Aomopactus Jekel, Amer. Phil. Soc. Proc. 15: 94, 1876, footnote. 
Moderately to densely scaly. Head broad, eyes strongly convex and ellipti- 
cal to subcircular, interocular distance a little greater than length of rostrum; 
rostrum not so thick as in preceding subgenera, feebly to distinctly tapering, 
median groove exceeding eyes, Support on mandible slightly to strongly elevated, 
scape passing eye, funicular segment 2 longer than 1. Prothorax with sides 
feebly rounded, base of pronotum not bisinuate. Scutellum small to obsolescent, 
vestiture sparse, fine. Elytron with base feebly, sometimes scarcely, thickened, 
humeri subobsolete. Angular piece between posterior margins of fore coxae 
frequently elevated. Sternite 5 of abdomen without transverse groove next to 
apical margin. Fore tibia feebly curved apically; corbel plate narrow or ab- 
sent, dorsal comb equal to or longer than distal comb. (fig. 2, H, J). Sperm- 
atheca greatly elongated basally (fig. 4, A, B, C). 
Type—Of Asynonychus, A. godmani Crotch, monobasic; of Ara- 
migus, Liparus tesselatus (sic) Say, designated by Pierce, 1913, p. 
416; of Aomopactus, Liparus tessellatus Say, by present designation. 
The similarity of the remarkable spermathecae of Asynonychus and 
Aramigus seems to indicate fundamental relationship, and it is chiefly 
on the strength of this likeness that the two groups are here synon- 
ymized. They differ considerably in several other respects. 
KEY TO GROUPS AND SPECIES OF ASYNONYCHUS 
1. Derm brownish to piceous, not entirely covered by the scales; rostrum 
scarcely tapering, latero-marginal carina distinct, intercarinal area 
concave; mandibles with Supports prominent, one or both sears facing 
obliquely mesad, left mandible not toothed on mesal edge above; 
scape exceeding eye by length of first funicular segment; puncture 
row 10 of elytron complete; vestiture on abdominal sternites ab- 
