224 WILLIAM J. FOX. 



46. — Heiul and thorax subtilely Sfuli>ture(l, clothed with imusually long pnbos- 

 cence ; no suture between the e])inu'iuni niesopleuralis and the mesoster- 



uum ; cheek.s not keeled beneath 47. 



Head and thorax coarsely sculptured, not pubescent more than usual ; a 

 suture of about the same proportions as that which separates the epis- 

 ternuni and epimerum niesopleuralis divides the mesopleurae from the 

 niesosternum aud uuites with the epistenial suture so as to form a sharp 

 angle ; cheeks beneath along the eye-margin with a slight keel ; clypeus 

 yellow ; tibial shield dark brown, darker anteriorly, marked with nu- 

 merous, tine, yellowish streaks |>ega!>iu!!$. 



47. — Anterior trochanters very long, ahr.ost eijualing their femora in length, and 

 nof much broadened aitically ; markings yellow; tibial shield broadly 

 margined with black anteriorly, otherwise yellow, irregularly streaked 

 with blackish medially: pubescence of head and thorax yellowish brown. 



thyreophoriis. 

 Anterior trochanters not over half the length of their femora aud consider- 

 ably broadened apically; markings white ; tibial shield greenish white, 

 streaked with paler throughout ; pubescence of head and thorax pale 



gray veriialis. 



48. — PronotUm strongly dentate laterally ; middle segment coarsely sculptured 



above, without enclosed smooth areas 49. 



Pronotum not dentate laterally, rounded ; middle segment above with two 



convex enclosures 51. 



49. — Scape of antennae compressed, broader by far at apex than at the base, fla- 



• gellum stout, not thickened medially nor clavate ; raesosternum with 



long, dense, white hair, wings hyaline (episternum niesopleuralis black).50. 



Scape of antennse cylindrical, not broader at apex than at base, tlagellum 



tolerably slender, slightly subclavate; mesosternum with short, sparse, 



pale silvery pubescence, wings fusco-hyaliue (episternum mesopleuralis 



and legs, almost entirely, yellow) Iiilari;^. 



.50. —Abdomen but little longer than head and thorax united, the sixth dorsal 

 rarely spotted with yellow; fore femora beneath, toward base, with 

 sparse, not long, white pubescence, at least not as long or as dense as that 

 on the mesosternum laterally (fore aud medial femora marked more or 



less with black) I'Ognatiis. 



Abdomen nearly twice as long as the head and thorax united, the sixth dorsal 

 .segment always spotted with yellow; fore femora beneath with dense, 

 white pubescence, as long and as dense as that on the mesosternum later- 

 ally (fore and medial legs entirely yellow) ciiigiilatii!!i. 



7)1. — The furrow that margins the lateral ridge of posterior face of middle seg- 

 ment strongly foveolate 52. 



The furrow that margins the lateral ridge of posterior face of middle seg- 

 ment not foveolate (no yellow spots on middle .segment)- .ooiifertus. 

 j>2. — Front and vertex rather coarsely ])iinctured. the punctuation of the dorsulum , 

 in comparison, distinctly finer and more even (markings i)ale yellow). 



luaciilipeiinis. 

 Front and vertex with even, distinct punctures, those of the dorsulum a little 



finer (markings bright yellow) iiitidiveutris. 



r->3. — Ocelli forming a curved line (fore tarsi not flattened) 54. 



Ocelli forming au equilateral triangle 55. 



