38 J. L. LECONTE, M. D. 



Smaller and narrower, elytra more strongl}' punctured, head strongly eonoave. 



labruni not toothed ; 10 mm.; Ga. ; Fla. ; Tex Troutalis. 



Of same size and form &s frontalis ; prothorax with two dusky spots and a pale 



dorsal stripe ; head more broadly concave ,• labrum indistinctly tridentate ; 



10 mm.: Ks divisa. 



Tribe 2. — Phengodini. 



The prothorax though rounded in front does not cover the head, 

 which is exposed. The eyes are convex, prominent, and widely sepa- 

 rated ; the antennae are not approximate, inserted in front and inside of 

 the eyes, and are plumose or flabellate in the S ; ( $ unknown). The 

 mandibles are long, slender and curved, the labrum connate with the 

 front, small in Pterotus, large and emarginate in Phengodes ; the middle 

 00X33 are contiguous, the metasternum between them being narrowly 

 carinate ; the side pieces of metathorax are broad and diagonally divided. 

 The gula is deeply impressed or excavated in all the genera. 



Three subtribes are indicated : 



Prosternum well developed in front of coxa?; front convex, narrowed between 



the antennse Pterotini. 



Prosternum very short as usual ; front flat, labrum large Phengodini. 



Prosternum well developed: front convex, labrum small Mastinooerini. 



Pterotini. 



PTEROTUS Lee. 



P. ohscuripennis Lee, from California; rufo-testaceous with piceous 

 elytra ; length 10 — 12 mm. The antennas are long, inserted under two 

 large convexities, ramose, the first joint stout, second small, 3 — 10 with 

 long processes, that of the third being medial and that of the tenth 

 apical ; eleventh as long as the process of the tenth, simple. Palpi short, 

 joints oval, nearly equal. Tibiae not compressed ; fourth joint of tarsi 

 moderately dilated, somewhat bilobed ; % seventh ventral broadly and 

 deeply emarginate, eighth flat, narrower, obtuse ; last dorsal of similar 

 size and form. 



Phengodini. 



The labrum is large ; metathoracic side pieces wide. 



Elytra subulate, tarsi with fourth joint lobed PHENGODES. 



Elytra entire, tarsi with third and fourth joints lobed ZARHIFIS. 



PHEIVGODES Latr. 



The head is deeply transversely excavated behind the eyes ; the gular 

 region is also deeply excavated and the sutures are confluent. 



The seventh ventral of the % (the only sex known), is strongly 

 emarginate, and the eighth narrower, obtuse at tip. The last dorsal is 

 not emarginate, with sometimes the head and tips of elytra fuscous. 



