108 On new Species of Fossorial Hymenoptera. 



suLliyalinc, beautifully iridescent, the nervures rufo-fuscous ; 

 an inteiTuj)ted line on the collar, two spots on each tegula, and 

 a .small oblonp; spot on each side of the insertion of the abdo- 

 men yellow ; the tibia? and knees of the anterior and inter- 

 mediate legs, and also the tarsi of the former, yellow ; the in- 

 termediate and posterior tarsi white, with the tips of the joints 

 black. Abdomen smooth and shining ; the extreme base of 

 the second segment ferruginous ; it has also a little before its 

 apical margin an interrupted yellow fascia, which widens 

 towards the lateral margins ; the apical margins of the fourth, 

 fifth, and sixth segments with narrow yellow fascia?, the first 

 slightly interrupted. 



Hah. St. Paulo. 



This insect may possibly be the male of Trachypus basalts, 

 since both are from St. Paulo. 



Trachypus basalis. 



Female. Length 5| lines. Black, and variegated with 

 yellow and feiTuginous. Head rather strongly punctured, the 

 punctures shallow and confluent ; the face, as high as the an- 

 tenna?, the clypeus, and a bilobed spot above it, also a minute 

 spot between the lobes, the scape of the antennae in front, the 

 cheeks, and a line behind the eyes yellow ; tips of the man- 

 dibles black ; the flagellum of the antennae fulvous beneath. 

 Thorax : the disk with fine shallow punctures ; an oblong 

 central broad depression and a narrower one on each side ; the 

 base of the metathorax very smooth and shining ; a slightl_y 

 interrupted line on the collar, the tegul», tubercles, and two 

 abbreviated lines at the apex of the metathorax yellow ; the 

 anterior and intermediate tibia?, and femora in front, yellow, 

 ferruginous above, and the tibia? with a black line behind ; 

 the tarsi ferruginous beneath and more or less fuscous above ; 

 the posterior femora fusco-ferruginous ; the apical joints of the 

 tarsi pale ferruginous ; wings flavo-hyaline, with the nervures 

 ferruginous. Abdomen very smooth and shining, the second 

 segment obscurely ferruginous ; an interrupted fascia at the 

 apex of the petiole ; a fascia on the apical margin of the second 

 segment, attenuated in the middle, and the margins of the 

 fourth and fifth with a narrow fascia, yellow ; the sides of 

 the apical segment yellow ; beneath, the second segment 

 yellow ish white, with a furcate black spot at the base ; the 

 a])ical margin of the fifth segment yellow. 



Hah. St. Paulo. 



