THE FAMILY EUCHARIDAE — GAHAN 437 



Because of inadequate descriptions and lack of material, the follow- 

 ing 11 described species have been omitted from the key to species: 

 O. f estiva (Fabricius) from Central America; maculata (Westwood) 

 and rapo (Walker) from Brazil; argentina and doellojuradoi Gemig- 

 nani from Argentina ; costaricensis and sixaloae Wheeler and Wheeler 

 from Costa Rica, and e?nma, gemiim, palgravei, and pheidolophaga 

 Girault from Australia. 



KEY TO SOME SPECIES OF ORASEMA 



1. Females 2 



Males 20 



2. Abdominal petiole nearly twice as broad as long; prescutum 



anteriorly broadly impressed in middle texana, new species 



Abdominal petiole at least as long as broad; prescutum with- 

 out a median impression anteriorly 3 



3. Axillae and scapulae dorsally nearly smooth and polished, never 



more than weakly lineolated ; mesosternum also mostly 



smooth coloradensis Wheeler 



Axillae and scapulae densely rugulose or punctate, never 

 polished; mesosternum usually strongly sculptured 4 



4. Thorax dorsally with coarse irregular rugose sculpture, never 



with nearly uniform rounded areas or shallow punctures, 



not alveolate 5 



Thorax usually with nearly uniform dense shallow rounded 

 punctures dorsally, resembling honeycomb, hence alveolately 

 sculptured; if not alveolate then sculpture is not coarse 

 but finely rugulose 8 



5. Mesoscutum coarsely transversely shagreened, the parapsides 



smoother; parapsidal grooves coarsely fo^eolate, scutellum 

 coarsely longitudinally shagreened and with partial longi- 

 tudinal striation; petiole longitudinally striate (from origi- 

 nal description cameroni Howard 



Sculpture not as above 6 



6. Antennal flagellum distinctly thicker than pedicel; all femora 



dark fuscous or metallic ; head mostly metallic green ; dorsum 

 of thorax green or if somewhat aeneous the postmarginal vein 



is very poorly developed and scarcely longer than stigmal vein 7 



Antennal flagellum not thicker than pedicel; all femora pale; 

 head and dorsum of thorax uniformly aeneous, only the pleura, 

 propodeum, and coxae more or less tinged with green; post- 

 marginal vein well developed and half as long as marginal. 



aenea, new species 



7. Supraclypeal area nearly twice as long as broad and separated 



from clypeus by only a broad shallow depression ; ocellocular 

 line a little longer than distance between posterior ocelli; 

 cheek fully as long as eye and with a broad shallow depression 

 running from eye to base of mandible; scapulae adjacent to 

 parapsidal grooves transversely rugose; scape and tegulae 



metallic tolteca Mann 



Supraclypeal area subquadrate, cut off from clypeus by a deep 

 furrow; ocellocular line distinctly shorter than distance be- 

 tween the posterior ocelli; cheek hardly as long as eye and 



