Heterogyna and Fossorial Hymen opt era. 231 



(0) 7. Vertex closely and rugosely punctured. 



(!)) 8. (^ body and legs entirely black ; J with the pos- 

 terior tibiiB simple . . . . . . . . Age7iia. 



(H) [). ^ abdomen red at the base, or with the legs 

 more or less red ; J with the posterior tibiiE 

 outwardly serrate . . . . . . . . Friootemis. 



{!)) 10. Four submargiual cells .. .. .. .. Ceropalcs. 



Afokus, Spin. (PI. YII. fig. 14.) 



Ins. Lig. ii. p. 5. 



A very distinct genus, diifering from our other British 

 Pompihdae in the greater length of the prothorax, which 

 in the ? is nearl}' as long as the mesothorax and 

 scutellum together ; it has also, like Evagethes, only two 

 submarginal cells in the upper wings. 



1. unicolor, Spin. Ins, Lig. ii. p. 33 ~- hicolor, Sm. 

 Fig. Smith Brit. Foss. Hym. pi. ii. fig. 11. 



3' entirely black ; ? with 1st, 2nd, and sometimes 

 base of the 3rd segment of the abdomen red. Entire 

 insect covered with a fine adpressed sericeous pile, 

 changing colour in different lights ; prothorax slightly 

 and arcuately emarginate posteriorly, very long, as long 

 as the mesothorax and scutellum together, in the ? ; 

 wings fuscous in the ? ; legs with a few fine spines on 

 the tibiae. 



Length 8—10 mill. 



Hah. — Very rare. Southend, two ? ; Pakefield, near 

 Lowestoft, one ? . — F. Smith. 



Evagethes. (PL VII. fig. 15.) 



Differs only from PompUiis in having two submarginal 

 cells. 



1. hicolor, Lep. Enc. Meth. x. p. 183 = Ajjorus hicolor. 

 Shuck. 



(? black, covered with silvery sheeny pubescence, 

 especially on the sides of the thorax, coxse, and on the 

 metathorax; 1st and 2nd segments of the abdomen 

 generally more or less red ; i^rothorax arcuately emargi- 

 nate posteriorly, apical ventral segment of abdomen 

 slightly carinated towards the base, 6th emarginate 

 and slightly depressed in the middle, as well as the 5th. 



