308 U. S. NATIONAL MUSEUM BULLETIN 2 1 6 part 3 



Propodeum beyond basal carina not as above, with strong transverse wrinkles, or 

 in males of duhiosum with only fine punctures and weak wrinkles; fourth 



and following tergites of female black 8 



8. Metapleurum covered with dense punctures and oblique wrinkles; propodeum 

 beyond basal carina entirely covered with dense wrinkles. 



5. discolor, new species 



Metapleurum with fine, moderately sparse punctures and in female with a 



few weak wrinkles; propodeum beyond basal carina only partl}^ wrinkled, 



at least the part next to the carina smooth 8. dubiosum Cresson 



I. BROCHUM GROUP 



Lower half of frons with a weak median longitudinal groove, with- 

 out carinae or wrinlding; upper tooth of mandible about half as long 

 as lower tooth; notaulus sharp; mesopleurum with longitudinal wrin- 

 lding, this wrinkling usually poorly developed in smaller males; basal 

 transverse carina of propodeum complete and strong; apical transverse 

 carina of propodeum well developed, interrupted medially; propodeum 

 transversely wrinkled, rather strongly wrinlded in female, weald}^ in 

 male; first tergite of female with a distinct dorsolateral longitudinal 

 carina, strongest near the spiracle. 



This group includes the two species treated below and two un- 

 described species in Mexico. 



1. Joppidiiim brochum, new species 



Front wing 6 to 12.7 mm. long; scutellum with a lateral carina on 

 its basal 0.4dz; mesopleurum of male with rather weak irregular- 

 sized punctures that are separated bj'' about 1.5 their diameter, and 

 rather weak longitudinal wrinkling that covers about 30% of its sur- 

 face ; mesopleurum of female with strong, regular longitudinal wrinkles 

 that cover about 90% of its surface, in the unwrinkled areas with 

 some small punctures; metapleurum of male with rather small punc- 

 tures that are separated by about 1.7 their diameter, its lower 0.2 to 

 0.5 with some longitudinal wrinkles; metapleurum of female entirely 

 covered with strong oblique wrinkles ; propodeum of male beyond the 

 basal carina covered with wrinkles of irregular strength and direction ; 

 propodeum of female beyond basal carina covered with strong, trans- 

 verse wrinldes that are irregular next to the apical carina. 



There are two subspecies, one in the southeastern United States, 

 the other in Oldahoma, Texas, and Mexico. 



1. Mesoscutum and pronotum brownish ferruginous; thoracic punctures and 

 wrinkles averaging finer and weaker; range: Oklahoma, Texas, and Mexico. 



la. brochum brochum, new subspecies 



Mesoscutum and pronotum blackish or reddish brown; thoracic punctures and 



wrinkles averaging coarser and stronger; range: southeastern United 



States lb. brochum fattigi, new subspecies 



