79 



PEDIOSCERTETES, Titos. 



Back of the head ascending ; vertex rises obliquely in front of the e^^es 

 in the form of a triangular pyramid; frontal costa distinct above the ocellus, 

 fading below; liice sub-oblique. Pronotuni regularly exjianding postex'iorly, 

 subtricarinate, the front lobes being rounded, so that the lateral carinae are indis- 

 tinct ; median absent or but a minute line; front margin truncate; hind mar 

 gin rounded; the three transverse impressions distinct. Elytra and wings ex- 

 tending beyond the abdomen. Posterior femora slender, a little shorter than 

 the abdomen in the female ; tirst joint of the posterior tarsi as long as the 

 other two. Metasternum broad ; the pi'osternum narrow, unspined, the 

 transverse groove distinct. This insect, seen from above, tapers considerably 

 from the metathorax to the liead, which is quite narrow^, but elongate perpen- 

 dicularly. Resembles, in general appearance, Acrolophitus, to which it is 

 closely allied, but from which it diifers in wanting the crest on the pronotum, 

 and in the posterior margin thereof being rounded. 



P. uevaciensis, Thos., Phil. Acad. Nat. Sci., 1873. 



The tip of the vertex separated from the portion between the eyes by a 

 curved sulcus, which runs from the upper cantiius of one eye to that of the 

 other; this portion of the vertex obliquely ascending and triangular; no 

 median or lateral foveola. Frontal costa prominent and narrow between the 

 eyes, and slightly sulcate ; the portion below the ocellus indistinct, a little 

 l)roader than that above, expanding below and slightly sulcate ; lateral carinas 

 indistinct, parallel; face somewhat oblique, narrow. Eyes oljlong, ovate, 

 oblique. Antennae extending about one-fourth their length beyond the pro- 

 notum, robust, very slightly depressed, and apparently enlarged toward the 

 apex. Front lobes of the pronotum rounded, sub-cylindrical; lateral carinse 

 obsolete on the front lobes, obtuse on the posterior lobe; median carina is 

 but an indistinct line ; three transverse incisions distinct, but not profound, 

 the posterior one situated a little behind the middle ; the posterior border is 

 regularly rounded, nearly semi-circular ; the posterior lateral margin curves 

 inward at the humerus, but makes no angle ; the posterior lobe is distinctly 

 broader than the head. Elytra of moderate width ; wings rather narrow; 

 both extend slightly beyond the abdomen. The abdomen comparatively, 

 enlarged and deep at the base; the valves of the ovipositor slender and acute. 

 The posterior femora are quite slender, being but slightly enlarged at base ; 



