Heterogyna and I<ossor{al Hymenoptera. 295 



and the tubercles often black and the scape of the an- 

 tennae black. 



Length 9—10 mill. 



Guildford, Dr. Capron ; and near Chobham. 



24. rdfius, Linn. Syst. Nat. ed. x. vol. i. p. 571. Fig. 

 Panz. Faun. Germ. 46, 10. 



Black ; scape of the antennae, except the base above, 

 a spot on each side of the collar, an interrupted band at 

 the base of the 2nd segment of the abdomen, sometimes, 

 but rarely, a small spot on each side of the 3rd, two wide 

 lateral spots or a continuous band on the 4th and 5th 

 yellow; femora black, yellow at the extreme apex in 

 the ^ , and on the anterior legs in front ; tibiae j^ellow, 

 narrowly black at the apex, anterior and intermediate 

 pairs black beneath ; tarsi with the basal joint pale in 

 the (? ; pale only on the posterior legs of the ? . Head 

 closely punctured, hairy; 6th joint of the antennae in 

 the ^ much constricted at the base ; thorax hairy, finely 

 and closely rugose ; metathorax with a defined basal area, 

 sulcate down the centre ; sides of the mesothorax beneath 

 transversely rugose ; abdomen shining, finely punctured, 

 ovate in both sexes, apical segment in the $ very narrow 

 and acuminate, shining, rugose, with a slight carina at 

 each side, sides below the carina with a dense fringe of 

 pale bristly hairs ; intermediate and posterior tibiae 

 dentate and spinose in the 2 . 



Length 10—13 mill. 



Hah. — Common. 



The black 3rd segment of the body gives this species 

 an appearance by which it may be easily recognised. 



25. chrysostoma, St. Farg. Ann. Soc. Fr. vol. iii. p. 704. 



= xylurgiis, Shuck. 

 Head and thorax black ; the former with the mandibles 

 and the entire scape of the antennae in the 2 , and the 

 scape of the antennae in front in the S^ , 3'ellow ; 

 clypeus and margins of the eyes covered with shining 

 golden hairs in the 2 , silvery in the <? , the latter 

 with a small spot on each side of the collar, and some- 

 times a spot on the tubercles, yellow ; abdomen black, 

 banded or spotted with yellow, having two small spots 

 or a narrow band on the basal segment, and two lateral 

 transverse spots on each of the 2nd, 3rd, and 4th 



