16 PROCEEDINGS OF THE NATIONAL. MUSEUM. vol.60. 



The following characters, in addition to those listed by Brues for 

 distinguishing this genus from OjyMonellus Westwood, alternate 

 with those given above under O i^hionellus : Frons convex; mesoscu- 

 tmn opaque, coarsely, reticulately punctured, rarely with lateral 

 lobes polished; scutellum concave; mesopleural groove polished 

 above and more or less rugose below. 



The following key includes all of the described species, except 

 Pharsalia albofacialis Cameron, as well as two new species. Cam- 

 eron's species, which is based entirely on a figure, was synonymized 

 by Morley with mrginiensis (Cresson) without any explanation of 

 his reasons for so doing. 



KEY TO SPECIES OF HYMENOPHARSALIA MORLEY. 



1. Antennae white annulate mexicana Morley. 



Antennae not white annulate 2. 



2. Head and lateral lobes of mesoscutum largely smooth 3. 



Head and lateral lobes of mesoscutum sculptured, the latter sometimes with 



a small polished area; hind basitarsus swollen 4. 



3. Scape below and tegulae yellow; face black and yellow_annulipes (Cameron). 

 Scape and tegulae black ; face entirely yellow ; hind basitarsus not swollen. 



schwarzi, new species. 



4. Clypeus strongly rounded at apex ; face at clypeal foveae not more, usually 



less, than half as broad as frons and narrower than clypeus 5. 



Clypeus narrowly truncate at apex ; face yellow, at clypeal foveae more than 

 half as broad as frons and scarcely narrower than clypeus. 



texana (Cresson). 



5. Face entirely yellow, about half as broad as frons; eyes with long dense 



hair foutsi, new species. 



Face more or less black; eyes with shorter sparser hair 6. 



6. Mandibles, clypeus, and face except in middle yellow ; hind tibia with a sub- 

 basal white annulus virginiensis (Cresson). 



Black without white or yellow markings except narrow inner orbits. 



bridwelli, new species. 



HYMENOPHARSALIA MEXICANA Morley. 



Hymenopharsalia mexicana Mokley, Rev. Ichn., Part 2, 1913, p. 99. 



The annulated antennae are very exceptional for the genus, while 

 the entirely black face with yellow mouth and scape is very charac- 

 teristic. 



HYMENOPHARSALIA ANNULIPES (Cameron). 



Pharsalia annuUpes Cameron, Timehri : Journ. Roy. Agr. and Comm. Soc. 

 Brit. Guiana, vol. 1 (ser. 3), 1911, p. 185. 



The smooth head and lateral lobes of mesoscutum ally this species 

 more closely to the next following species than to any of the others, 

 while its yellow scape and tegulae readily distinguish it from any of 

 the species except possibly viexicana. The latter and texana have the 



