478 SUPPLEMENT. 
TRIOROPHUS (p. 1). 
Triorophus nodiceps (p. 2). 
To the Mexican locality given, add :—San Felipe Sabinas in Coahuila (Flohr). 
Three additional specimens of this species have been received by us from Mr. Flohr. 
3. Triorophus lecontei. 
Triorophus lecontei, Casey, Ann. N. York Acad. v. pp. 8327, 502 (Nov. 1890)’. 
Hab. Nort America, El Paso in Texas 1—Mexico, Paso del Norte in Chihuahua, 
Chihuahua city, Villa Lerdo in Durango (Hoge). 
Found in abundance by Herr Hége at Villa Lerdo. Mexican specimens agree with 
Capt. Casey’s description, except that many of them have the thorax as finely punc- 
tured as in T. levis. 
TRIMYTIS. (To follow the genus Triorophus, p. 2.) 
Trimytis, Leconte, Ann. Lyceum N. York, v. p. 141 (1852); Horn, Rev. Ten. of Am. north of 
Mexico, p. 261. 
Three species of this genus have been described, all from the United States; two are 
now added from Mexico. 
1. Trimytis obovata. (Tab. XXII. fig. 2.) 
Moderately elongate, obovate, very convex, pitchy-black, slightly shining. Head finely, sparsely punctate, and 
with numerous short longitudinal ruge between the eyes; eyes not prominent, the orbits extending half- 
way across them; middle lobe of the epistoma broadly produced, subtruncate in front; prothorax strongly 
transverse, subtruncate at the base and apex, the sides gradually and obliquely converging from the base, 
the anterior angles acutely prolonged in front, and with a few fine vibrisse, the disc rather finely, the 
lateral portions very coarsely and deeply, punctate, the punctures towards the sides longitudinally 
confluent; elytra moderately long, widest a little behind the middle, slightly narrowed in front, finely 
margined at the base, with regular series of coarse deep punctures extending from the base to the middle, 
almost smooth beyond, the interstices with a few very widely scattered exceedingly minute punctures, the 
scutellar region more distinctly punctate; beneath exceedingly coarsely, deeply punctate, the ventral 
surface with very minute scattered punctures. 
Length 53 millim. (<¢.) 
Hab. Mexico, Chihuahua city (Hége). 
One specimen. Closely allied to 7. pruinosa, Lec., but of more obovate shape, the 
anterior angles of the thorax more acute, the elytra with regular series of coarse 
punctures on their basal half, their interstices almost smooth. 
2. Trimytis flohri. 
Elongate-ovate, rather narrow, very convex, brownish-black, subopaque. Head, including the mandibles, 
rather coarsely, very densely punctate, the punctures longitudinally confluent; eyes rather prominent, 
the orbits scarcely impinging upon them ; middle lobe of the epistoma broadly produced, rounded in front ; 
prothorax strongly transverse, very convex, bisinuate at the base, a little narrowed in front, the sides 
