flat, silicate below the ocellus. Pronotiim compressed, anteriorly and poste- 

 riorly acute-angled ; carina much elevated, cristate, arcuate, produced, and 

 slightly parted by the sulcus a little in front of the middle. Antennae flat- 

 tened, dilate, acuminate. Elytra longer than the abdomen, grayish, each with 

 fuscous points sprinkled over it, and two fascia of the same color ; apex ob- 

 liquely truncate, with a pellucid spot. Posterior femora mucli inflated, inflated 

 below, only cristate above, the crest abbreviated ; posterior tibiae fasciate, with 

 fuscous and testaceous. 



Length of body, 1.08 inches. 



Mexico temperata (Saussure). 



b. Head somewhat rounded ; face arcuate; fastigium rounded ; face com- 

 pressed (approaches Pachytyhis) : 



T. nietauus Sauss., Rev. et Mag. Zool., XIII (1861), 321. 



Fuscous-gray, or a brownish-fuscous, tesselated with blackish. Body 

 much compressed. Vertex narrow, rugose, carinate through its whole length, 

 trigonal, and projecting in front; foveola scarcely deflexed, flat, sub-pyriform ; 

 margins elevated, partitioned by a profound, transverse sulcus. Face per- 

 pendicular, strongly quadricarinate, and punctate ; costa elevated, sub-sulcate, 

 narrow, and tricarinate above ; lateral foveolge conspicuous, flat, quadrate, car- 

 inated in the middle ; eyes flattened. Pronotum flat and granulated above, 

 sub-excavated and somewhat rugose; carina cristate, equal throughout, divided 

 into two parts by the posterior sulcus a little in front of the middle ; lateral 

 carinas acute. Elytra slightly passing the abdomen, sparsely punctate. Wings 

 scarlet; margin and a sub-costal fascia fuscous. Tibiae pale-red. 



Length, 1.2 inches. 



Mexico (Saussure). 



Division 3. — Antennte crassate; head convex, as in Stejwhotlirus, arcuate; 

 pronotum strongly carinated longitudinally : 



T. otomituf^, Sauss., Rev. et Mag. Zool., XIII (1861), 322. 



Male. — Small, fuscous or bay. Head convex ; face deflexed, arcuate, 

 quadricarinate ; vertex convex, carinated, advanced in front of the eyes in an 

 acute rostrum, but only slightly deflexed, with a deep, narrow foveola, cari- 

 nate-margined ; apex acuminate; lateral foveoise distinct, short, triangulai 



