312 HETEROMERA. 
with the obtuse anterior angles raised, not deflexed ; the first joint of the hind tarsi is 
shorter than the following joints united. The spots on the elytra are usually smaller 
than in H. auriculata: in the latter the antemedian juxta-sutural spot is extended to 
the suture, so as to form with the one on the opposite elytron a common, transverse, 
large black patch. 
2. Horia auriculata. (Tab. XVII. figg. 9,6; 9a, labium; 9%, maxilla and 
maxillary palpus; 9c, cedeagus; 9d, cedeagus in profile.) 
? Horia maculata, Dugés, La Naturaleza, i. p. 103, t. 1a. fig. 4°; Leconte & Horn, Class. Col. 
N.-Am. 2nd edit. p. 417 (1883) * (nec Swed.). 
Reddish-testaceous, shining ; the mandibles, eyes, palpi, antenns, and legs, the base of the femora excepted, 
black ; the elytra with the base and apex and two interrupted fascia (formed by four large spots on each 
elytron) black. The head almost smooth—in the male exceedingly large, with the temples greatly 
swollen on either side, so as to leave a very deep median groove, the convex portion forming ‘a 
more or less prominent ear-like lateral projection, which is deeply excavate behind for the reception 
of the anterior angle of the prothorax—in the female much smaller, with the temples only moderately 
swollen on either side, and the median groove shallow; the antenne in both sexes much more elongate 
than in H. maculata, with the fourth joint longer than the second and third joints united; the prothorax 
in the male much narrower than in H. maculata, not so wide anteriorly, less transverse, with the 
anterior angles deflexed and considerably produced in front, the transverse basal depression shallower, 
the deep transverse depression on either side near the anterior margin almost or quite obsolete, the surface 
smooth or minutely and sparsely punctured,—in the female not nearly so wide as in the same sex of 
HI. maculata, and very much narrower at the apex than at the base; the first joint of the hind tarsi much 
more elongate than in H. maculata, as long as the following joints united; the sixth ventral segment cleft 
in the middle in the male. 
Length 19-37 millim. (¢ 2.) 
Hab. Norra America, South-western Arizona ?.—MeExico?, Mazatlan, San Blas 
(Forrer), Acapulco (H. H. Smith), Colima (Dugés1), Guadalajara, Almolonga (Hége), 
Tasco, Oaxaca (coll. F. Bates); GuatemaLa, Cerro Zunil, San Isidro, San Gerénimo 
(Champion); Costa Rica (Sallé, Van Patten).—AntTILLES, Barbados. 
Specimens of this species were chiefly obtained by me in the open verandahs of 
houses; and on more than one occasion I have observed the insect crawling on the 
wood-work in the close vicinity of the nests of a large blue wasp, these nests being 
commonly found in such places. It is probable, therefore, that H. auriculata really 
preys upon this wasp, and not upon Xylocopa. 
The insect from Barbados mentioned by Landsdown Guilding is evidently referable to 
H. auriculata. I have not seen an example of H. auriculata from south of Costa Rica. 
Group NEMOGNATHIDES. 
NEMOGNATHA. 
Nemognatha, Mliger, Magazin, vi. p. 333 (1807); Lacordaire, Gen. Col. v. p. 691; Leconte, Trans. 
Am, Ent. Soe. viii. p. 2127. 
Leptopalpus, Guérin, Icon. Régne Anim., Ins. p. 136. 
