Heterogi/na and Fossorial Hijmenoptera. 251 



Hah. — Chobliam, Weybridge, Coombe Wood, Sand- 

 hurst, &c. ; generally rare, but I have met with it pretty 

 commonly on Chobliam Common in July. It is exceed- 

 ingly active and difficult to catch. 



2. maritimus, Sm. Brit. Foss. Hym. p. 91. 



Differs from the above in the brassy tinge of the head 

 and thorax, the comparatively longer metathorax, and 

 the entirely black abdomen of the ? . 



Hah. — Sand-hills, Deal, F. Smith. I have never seen 

 this species. 



DiNETUS, JtiV. (PI. VII. fig. 21). 



Nouv. Meth. Hym. p. 208. 



The neuration of the wings, alone, separates this genus 

 off from its allies ; the radial cell is short and truncate 

 at its apex, and widely appendiculated ; there are only 

 two submarginal cells, neither of which are petiolated, 

 and each of which receives a recurrent nervure. 



1. 2»cti(s, Fabr. Ent. Syst. ii. 299. Fig. Smith Brit. 

 Foss. Hym. pi. iii. fig. 3. 



Head black, very closely jiunctured, with a streak 

 behind each eye and the mandibles in both sexes flavous ; 

 the ^ has, besides, the face and the antennae of the same 

 colour, the latter organs in this sex curved in a spiral 

 sort of twist, rather above their middle. Thorax black 

 and punctured like the head ; collar, tubercles, tegulae, 

 scutellum, and post-scutellum flavous ; metathorax with 

 a wide line of silvery pubescence on each side ; abdomen 

 in the c? with the first three segments flavous, their apical 

 margins brown, the 4th and 5th brown, with a paler 

 transverse spot at the apex, 6th and 7th testaceous ; ? 

 with the first three segments testaceous-red, the last three 

 black, the 2nd, 3rd, and 4tli each with a small yellow 

 spot on each side at the apical margin, 5th with a pale 

 apical band, and 6th with a large triangular apical spot, 

 extreme apex testaceous-brown ; legs flavous, except the 

 posterior femora, in the <? ; ? with the femora black, 

 except a white spot at the apex of the 1st and 2nd pairs 

 beneath ; tibiae and tarsi pale, the former black in- 

 wardly. 



Length 8 mill. 



Hah. — Windsor, Ascot. Very rare. 



TRANS. ENT. SOC. 1880. — PART IV. (DEC.) 2 B 



