288 HYMENOPTERA. 



are fuscous, with a slight violaceous tinge. The radial cellule is moderately wide, and 

 hardly reaches to the apex of the third cubital cellule ; the first abscissa of the radius 

 is slightly, the apical abscissa roundly, curved. The first transverse cubital nervure 

 is oblique and hardly curved ; the second is roundly curved in the middle ; the third 

 is sharply angled a little above the middle. Both the recurrent nervures are received 

 shortly beyond the middle of their respective cellules. The third cubital cellule is wide 

 and at the top is only slightly narrower than it is at the bottom. The transverse median 

 nervure is almost interstitial. 



M. psyra has the head and thorax less pilose than in any of the other species I 

 have described. 



° 32. Mutilla Orthona. (Tab. XIII. fig. 26, 6 organ.) 



Long. 8 millim. S • 



Hab. Panama, San Feliz in Chiriqui (Champion). 



Head, if anything, narrower than the thorax, apparently coarsely punctured, the 

 sculpture hidden by a thick covering of silvery hair ; the clypeus shining, glabrous, the 

 apex broadly rounded ; the tips of the mandibles ferruginous. The eyes reaching to the 

 top of the head; the head not much developed behind them, and roundly narrowed. The 

 scape of the antennae shining, and with a few punctures and hairs ; the flagellum with 

 a dull microscopic pile ; the third joint a little longer than the fourth. The pronotum 

 punctured, the apex with a dense band of dull silvery hair ; at the apex it is oval. The 

 mesonotum coarsely punctured, and sparsely covered with dull ferruginous hair ; the 

 scutellum coriaceous, and covered with long white hair. The tegulse large, the basal 

 half smooth and glabrous, the apical half densely covered with long white hair. The 

 median segment coarsely reticulated, the base in the middle with dense white pubes- 

 cence ; at the base there is a central area, rounded at the apex, and this is bordered by 

 another area on either side, these having the apex lanceolate — they join the central 

 area obliquely, and do not reach its apex. The mesopleurae are densely covered with 

 silvery hair, hiding the sculpture ; the metapleurae are reticulated. The basal segment 

 of the abdomen is black, except at the apex ; it bears large punctures and long white 

 hair ; the basal teeth are stout, conical. The second segment has some punctures at 

 the sides towards the base. The other segments are slightly punctured at the base, and 

 are fringed with long fiery-red hair. The pygidium is punctured at the base ; the apex 

 in the middle has a stout tooth ; there is a .keel at the sides towards the apex ; the hair 

 is long and thick. The basal ventral segment is thickened in the middle throughout 

 and hardly depressed ; the second segment has some large widely separated punctures ; 

 the other segments are more finely punctured at the base. The hypopygium is depressed 

 in the middle at the apex. The legs are covered with silvery hair ; the calcaria are 



