Heterogyna and Fussorial Hymenoptera. '2G7 



segments with irregular erect hairs ; apical segment in 

 the (? with a delicate spine at each side ; under side 

 of all the segments, except the basal one, with long 

 pilose hairs. 



Length 7 — 9 mill. 



Hah. — Worthing ; Hastings ; Ryde ; Bristol ; Lyme 

 Regis. Rare. 



Nysson, Latr. (PL VIII. fig. 33). 

 Prec. Caract. Gen. Ins. p. 125. 

 A genus which may easily be determined by the square 

 metathorax, truncate at the apex, and spined at the 

 posterior angles. The wings have three submarginal 

 cells, the 2nd petiolated ; the abdomen is black, banded 

 or spotted with yellow at the sides, the base in some 

 species more or less red. 



(4) 1. Anal cell of hind wings terminating considerably 



before the origin of the cubital nerve; 1st seg- 

 ment of body much narrower than 2nd. (PI. VIII. 

 fig. U). 



(3) 2. Tubercles of thorax black .tpino.ms. 



(•^) ;]. Tubercles of thorax yellow intciriiptus. 



(1) 4. Anal cell of hind wings terminating at or beyond 

 the origin of the cubital nerve; first joint of body 

 as wide or wider than 2nd. (PI. YIII. fig. 35). 



((!) 5. Larger, thorax very rugose, with a yellow line in 



front; basal segment of the body very rarely red 3-macidatus. 



(5) 6. Smaller, thorax only rugosely punctured, without a 



pale line in front ; basal segment of body always 



brownish red dimidiatus. 



1. sjnnosus, Fab. Syst. Ent. p. 373. Fig. Panz. Faun. 

 Germ. 62, 15. (PL YIII. fig. 34). 

 Black, a band across the prothorax, often wanting in 

 the <? , and a band at the apex of the 1st, 2nd, and 3rd 

 abdominal segments in the <? , a spot on each side of the 

 1st segment in the ? , and an interrupted band on 

 the 2nd and 3rd, yellow ; tubercles black ; tegulae pitchy ; 

 wings clouded ; legs in the (? black, with the extreme 

 apex of the femora, base and apex of the tibiae, and 

 tarsi red ; legs in the 2 red, with the femora more or less 

 black at the base. Head and thorax very rugosely 

 punctured, densely covered with short ochreous hairs in 

 the (? , sparsely so in the 5 ; post-scutellum and meta- 

 thorax clathrate, the latter hairy at its sides, especially 

 in the c? , and armed on each side with a short thick 



TRANS. KNT. SOC. 1880. FART IV. (DEC.) 2 D 



