Heterogj/nn and Fossorial Hi/moiopfera. 253 



2. stigma, Panz. Faun. Germ. 107, 13. 



Smaller than hoops. The c? has a doul)le, transverse 

 cream-colom-ed spot just above the insertion of the 

 antennae ; the thorax is dull and shallowly punctured ; 

 the metathorax is so finely reticulated that it only 

 13resents a dull appearance, except under a strong power, 

 and differs in this very notably from hoops, where the 

 reticulation is large and very distinct. 



The ? differs in having the thorax smooth, with o]ily a 

 very few large scattered punctures. 



Length 7 — 8 mill. 



Hah. — Weybridge, Deal, Chobham, Littlehampton, N. 

 Wales. 



Very rare, and the <? ver}^ difficult to catch ; it sits 

 down in the bright sun on the most exposed sandy places, 

 and is generally off" before a net can be got over it. I 

 have only taken two males, both at Cliol)ham in June, 

 but neither males nor females appear to come out except 

 on the hottest days. 



PEMPHEEDONID^. 



(4) 1. One recurrent nervure. 



(3) 2. Anastomising with 1st transverse cuLital nervure Spllomena. 

 (2) 3. Joining the cubitnl nervure about the middle of 



the 1st submarginal cell . . . . . . . . Sttginns. 



(1) 4. Two recun-ent nervures. 



(8) 5. Head and thorax without long pilose hairs. 



(7) C. Lahrum triangular, notched at the apex . . Diodontus. 



(0) 7. Labrum produced into a simple point at the apex Passaloecus. 



(5) 8. Head and thorax covered more or less sparsely 



with long pilose hairs. 

 (10) 9. Face simple between the antennje . . . . Pemplircdon. 



(9) 10. Face between the antennas with a blunt tubercle 



or spine . . . . . . . . . . . . Ceratojiliorus. 



Spilomena, Shuck. (PL VII. fig. 23). 



Trans. Ent. Soc. ii. p. 79 = Celia, Shuck. Brit. Foss. 



Hym. p. 182. 



This and the following genus are remarkable for the 

 very large stigma of the anterior wings, and are amongst 

 the smallest of our Aculeates. Sjnhjncna has two sub- 

 marginal cells, the 2nd somewhat diamond-shaped, the 

 recm-rent ner-\T^ire joining the 1st transverse cubital ner- 

 vure. Abdomen nearly sessile. 



