iRT. 16 WASPS OF THE SUBFAMILY BEACONINAE MUESEBECK 35 



The more important differences between sandus and imitatus are 

 mentioned in the dicussion of the latter species. 



The following material of sanctus has been examined: vSeveral 

 specimens in the Philadelphia Academy of Sciences from New Jersey, 

 Virginia, Louisiana, Texas, and Georgia; a single specimen in the 

 collection of the Boston Society of Natural History, from Westport, 

 Massachusetts (C. W. Johnson); six specimens from Illinois in the 

 collection of the University of Illinois; and 16 specimens in the 

 United States National Museum, from Michigan, Illinois, Indiana, 

 Ohio, West Virginia, North Carolina, Louisiana, Kansas, and Con- 

 necticut. There is also one specimen at the Gipsy Moth Labora- 

 tory, Melrose Highlands, Massachusetts, recorded as reared from a 

 larva of Pyrausta pertextalis Lederer, from Bedford, Massachusetts. 



7. BASSUS ACICULATUS (Ashmead) 



Microdus aciculatus Ashmead, Proc. U. S. Nat. Mus., vol. 11, 1889 (1888)^ 

 p. G39. 



Type.— In the United States National Museum. 



Closely resembles ahdominalis, from which it differs most conspic- 

 uously in having the head and thorax black and the legs more or less 

 blackish. Face much broader than long to the apex of clypeus; 

 malar space about half the eye height; temples distinctly bidging a 

 little, not strongly receding as is abdominalis; third segment of labial 

 palpi minute; antennae very slender; parapsidal grooves sharply 

 impressed, minutely foveolate; middle mesonotal lobe prominent 

 anteriorly; propodeum rugulose, not distinctly areolated; mesopleural 

 furrow smooth; posterior tibiae strongly thickened at apex and with 

 numerous short stout spines above the outer terminal spur; inner 

 spur of hind tibia a little less than half the basitarsus; last segment 

 of hind tarsi longer than the third; second cubital cell subsessile or 

 shortly petiolate; first abscissa of mediella about as long as the second; 

 first abdominal tergite shghtly longer than broad at apex and pro- 

 vided with two widely separated dorsal longitudinal keels ; first, sec- 

 ond, and most of third tergites closely longitudinall}^ aciculate; ovi- 

 positor sheaths longer than the abdomen but shorter tlian the body. 

 Head and thorax black; abdomen ferruginous; all coxae and tro- 

 chanters black or blackish; rest of legs mostly reddish brown, more or 

 less tinged with blackish; wings weakly infumated. 



Known only from the type series, which is from Texas. 



8. BASSUS ABDOMINALIS, new species 



Very similar to acicvlaius in habitus and sculpture, but at once 

 distinguished by the testa,ceous head and thorax and pale legs. 



Female. — Length, 5 mm. Head strongly transverse; face much 

 broader than long to the apex of clypeus, rather flat; eyes short oval ; 

 malar space usually distinctly more than half as long as the eyes; 



