87 
(BX) 
ZONITIS.—TETRAONYX. 
as long, the mandibles rather elongate; the eyes very large, deeply emarginate, alm<st contiguous beneath 
and rather narrowly separated above ; last joint of the maxillary palpi elongate, subcylindrical, truncate 
at the tip; antenne nearly as long as the body, very slender, subfiliform, joints 2 aud 3 subequal, 4 nearly 
twice as long as 3, 4-6 subequal, 7-11 a little thinner and rather shorter; prothorax longer than broad, 
flattened on the disc, subcampanulate, gradually narrowing from the middle to the apex, subparallel at 
the sides behind, densely, finely, confluently punctured, and with an impressed median line; scutellum 
densely, minutely punctured ; elytra elongate, parallel, very densely and finely punctured; beneath more 
shining, closely and finely punctured; hind tibial spurs rather stout, spoon-shaped, subequal; sixth 
ventral segment very deeply triangularly emarginate in the male. 
Length 124 millim. (<¢.) 
Hab. Guatemata, Volcan de Atitlan 3000 foet (Champion). 
One male specimen, apparently immature. A species readily recognizable by its 
exceedingly large eyes, very long and slender antenne, elongate, subcampanuliform 
thorax, and very dense, fine punctuation. ‘The upper surface is obscure testaceous, 
opaque, and on the thorax and scutellum there is a reddish-brown median vitta. The 
antenne and tarsi have an annulated appearance, the extreme base of their articulations 
being pale testaceous. ‘The antenne are very slender, and become slightly thinner 
towards the tip. 
To judge from the description, Z. megalops approaches Z. longicornis, Horn, from 
Illinois, in some of its characters. 
Group CANTHARIDES. 
TETRAONYX. 
Tetraonyx, Latreille, in Humboldt & Bonpland’s Obs. Zool. i. p. 160 (1811) ; Lacordaire, Gen. Col. 
v. p. 673; Haag, Stett. ent. Zeit. 1879, p. 249; Horn, Trans. Am. Ent. Soc. xii. p. 116. 
Picnoseus, Solier, in Gay’s Hist. fis. y polit. de Chile, v. p. 281 (1851). 
Jodema, Pascoe, Journ. Ent. 1. p. 57 (1860). 
An exclusively American genus, and particularly rich in species in the tropical 
regions of the Southern continent; it extends southwards to Chili and the Argentine 
Republic and northwards to the Southern United States, and is also represented in the 
Antilles. Haag in his Monograph (Stett. ent. Zeit. 1879, pp. 249 e¢ seq.) enumerates 
seventy-five species as belonging to it, thirteen of which occur within our limits; of 
these latter, however, three are not represented in the collections before me, and the 
locality is in two cases doubtful. Three species only have been recorded from north of 
the Mexican frontier: one of these, 7. guadrimaculatus (Fabr.), is almost certain to be 
found eventually in Mexico ; the other two are known to be Mexican. Some of the 
species, 7. sexguttatus &c., are extremely variable as regards the colour and markings 
of the elytra. The males in this genus have the sixth ventral segment deeply emargi- 
nate; and in some cases, 7’. fulvus, 7. frontalis, &c., the front tarsi dilated, with their 
3DD 2 
