XV. MISCOPHUS. 91 
verse ; the tegule piceous; the wings fuscous, their nervures 
piceous ; the legs black, with the apical joints of the tarsi pi- 
ceous, the anterior tarsi ciliated, and the intermediate and pos- 
terior tibize with a double row of spines on the outside. 
The abdomen punctured, subpubescent, the margins of the 
segments depressed, and sericeous on the sides ¢. 
The ¢ differs in having more of the silvery pubescence, and 
the apical joints of the tarsi ferruginous. 
In the Cabinets of Mr. Walker, the Rev. 
G. T. Rudd, Mr, Curtis, and my own. 
+4} Vander Linden considers this insect as merely a 
black variety of the 7. pompiliformis, but it is certainly dis- 
tinct, for the third submarginal cell is much narrower than 
in that insect, in which it occupies but little less than one- 
third of the marginal cell, not including the appendicula- 
tion; whereas in the wnicolor it does not occupy more 
than one-seventh of that cell, besides which, the meta- 
thorax is much more deeply and somewhat differently 
sculptured. Found at Black Gang Chine, Isle of Wight, 
by the Rev. G. T. Rudd, Mr. Walker, and Mr. Curtis. 
2. Two submarginal cells. 
Genus XV. Muiscornus. Jurine. 
Heap large, seen from above subquadrate, with a depression on 
each side in front for the reception of the antenne ; eyes oval, 
distant, very slightly converging; the stemmata placed high 
upon the vertex, in an equilateral triangle, the posterior ones 
far back, nearly in a line with the return of the posterior 
margin of the eyes; antenne filiform, inserted at the base of 
the clypeus ; the scapus obconic, the second joint slightly 
incrassate, the rest cylindrical, subequal ; the clypeus trans- 
verse, with the anterior margin reflexed ; labrum concealed ; 
the mandibles unidentate, tuberculated within, and having a 
