212 HETEROMERA. 
decumbent pubescence and long, coarse, erect hairs. The thoracic horn is very broad 
and stout in the female, a little narrower in the male, sharply margined and more or 
less serrate at the sides; the crest is abruptly elevated, strongly margined, and has a 
carina down the middle *. The fifth ventral segment has a shallow triangular impres- 
sion at the apex in the male. The apices of the elytra are conjointly rounded in both 
sexes. 
13. Notoxus monodon. 
Anthicus monodon, Fabr. Syst. Eleuth. i. p. 289°; Say, Amer. Ent. p. 21, t. 10. fig. 2*; Complete - 
Writings, 1. p. 21. 
Notoxus monodon, La Ferté, Monogr. Anthic. p. 37, t. 21. fig. 7°; Lec. Proc. Ac. Phil. vi. p. 934; 
Horn, Trans. Am. Ent. Soc. xi. p. 171’. 
Monocerus monodon, Lec. Journ. Acad. Phil. n. ser. 1. p. 90°. 
Notoxus pilati, La Ferté, Monogr. Anthic. p. 2977. : 
var. Notoxus decoloratus, La Ferté, Monogr. Anthic. p. 302 (=testaceus, Pilate, in litt.) °. 
var. Notoxus cumanensis, La Ferté, Monogr. Anthic. p. 38°. 
var. Notoxus piccolominii (Dupont), La Ferté, Monogr. Anthic. p. 38°. 
Hab. Norta America!?346, everywhere in the United States and also in Lower 
California ®, California 1°, Texas’ °.—Mexico, Chilpancingo (H. H. Smith), Guanajuato 
(Sallé), Acapulco, Iguala, Cuernavaca, Vera Cruz, Jalapa (Hoge); British Honpvuras, 
R. Hondo (Blancaneaux); Guatemaua, Antigua (Sadlé), Zapote, Duefias, Guatemala 
city (Champion); Panama, Caldera and San Lorenzo in Chiriqui (Champion).—VENE- 
ZUELA, Cumana ®. 
This is by far the commonest species of Notoxus in Central America, and at the same 
time one of the most widely distributed of the whole of the American Heteromera. 
More than half of the large number of specimens before me, including the whole of 
those from the State of Panama, have the sides of the thorax and the sides of the 
elytra from the base to the median fascia marked with black, a few also having a 
narrow subapical fascia. Most of those from Mexico have these markings obliterated, 
and the elytra merely with a spot on either side of the scutellum and a transverse 
fascia a little beyond the middle, the fascia extending upwards at the suture. 
N. monodon is distinguishable from most of the other species here described by the 
median elytral fascia curving up towards the suture and there forming a broad quadran- 
gular patch ; the pubescence is long and coarse, with long erect hairs intermixed ; the 
anterior tibie are simple, and the elytra are conjointly rounded, in both sexes; the 
thoracic horn is moderately long and broad, and varies a good deal in the form of the 
margin &c. WN. cumanensis was chiefly separated from NV. monodon by La Ferté owing 
to the difference of locality ; the characters given by him to distinguish it are derived 
entirely from the thorax and are of a variable nature. The example from Antigua in 
Sallé’s collection is labelled with the MS. name of NV. angustatus, La Ferté. Dr. Horn 
* Omitted by our artist. 
