ZONITIS. 383 
male the fifth ventral segment is transversely depressed in the middle behind, and the 
sixth segment is cleft down the centre. Our numerous specimens of this species 
exhibit no variation in the colour of the head, thorax, or underside. 
2. Zonitis rufa. 
- Zonitis rufa, Lec. Proc. Acad. Phil. vii. p. 851; Horn, Trans. Am. Ent. Soe. v. p. 155”. 
Zonitis rubra, Dugés, La Naturaleza, i. p. 166, t. 2. fig. 13°; An. Mus. Michoacano, ii. p. 107 
bis *. 
Hab. Nortu America, Frontera, Rio Grande 1.—Mexico (Sallé, ex coll. Sturm; coll. 
F'. Bates), Mexico city (Dr. Palmer), Parada (Sallé), Guanajuato 3 4, Tupataro + (Dugés). 
We have received four examples of this species from Mexico. It may easily be — 
known by the uniform sanguineous colour of the upper surface. The antennz, legs, 
and under surface, the rufous venter excepted, are black. Dr. Horn describes? the 
body above and beneath as pale sanguineous. 
8. Zonitis tenebrosa. (Tab. XVII. fig. 19.) 
Elongate, narrow, rather depressed, subparallel, opaque, finely pubescent; black, the head brownish at the 
sides and in front, the prothorax at the sides (except just before the middle laterally, as seen from above) 
brownish-yellow ; beneath, the antenne, and legs black; the entire upper surface very densely and 
finely punctured. Head broader than long, about as wide as the prothorax, with the mandibles com- 
paratively short and the labrum strongly transverse ; the eyes transverse, convex, rather small; antennz 
long, filiform, the joints of uniform thickness, 2 and 3 equal in length, 4-7 more elongate, subequal ; 
prothorax subcampanulate, parallel at the sides behind, as long as broad, somewhat flattened on the disc, 
and with a fine, impressed, median line; elytra elongate, rather narrow, subparallel; beneath shining, 
more sparsely punctured ; hind tibial spurs moderately stout, subequal; sixth ventral segment cleft and 
deeply excavate in the middle in the male, 
Length 83 millim. (¢.) 
Hab. Mexico, Tacambaro in Michoacan (Hége). 
One example only of this peculiar little species has been received. It is not very 
closely allied to any described Zonitis known to me. 
4, Zonitis atra. 
Zonitis atra, Dugés, La Naturaleza, v. p. 146, t. 4a. figg. 11, ll a—e’; An. Mus. Michoacano, ii. 
p. 108 dis’. ; 
Hab. Mexico, Leon ?, Guanajuato ! (Dugés). 
Described from a single mutilated male example, found dead, upon a hill at Leon, in - 
the State of Guanajuato. The following is a translation of its principal characters :-— 
Black; mandibles very large, about as long as the head, arched, pointed at the tip; 
head quadrate, with the hind angles prominent, covered with irregular but numerous 
punctures or depressions, and with a fine median groove; the antenne elongate, sub- 
filiform, slightly dentate, with the apical joint the stoutest and broadest; the prothorax 
