90 



MISCOPHUS. 



of the vertex ; the face with a thin, silky, silvery- white pubes- 

 cence ; the tips of the mandibles ferruginous. Thorax : the 

 disk shining, evenly but not so closely punctured as the head ; 

 the metathorax opake, and longitudinally striated above, the 

 truncation striated transversely; the wings slightly coloured 

 and iridescent, the nervures and tegulae rufo-testaceous; the 

 apical joints of the tarsi rufo-testaceous, the anterior pair 

 ciliated ; the intermediate and posterior pair with a double row 

 of spines on the outside. Abdomen closely and delicately 

 punctured ; the margins of the segments depressed, and having 

 at the sides an obscure silvery pile ; the apex acute. 



Male very closely resembling the female, but with a dense silvery 

 pubescence on the face ; the metathorax more pubescent, and 

 the tarsi redder; the abdomen more elongate. 



This is a rare and very local species. I have twice taken 

 specimens at Sandhurst, Berks, in the beginning of June, also 

 at Weybridge in July, and both sexes in Sandown Bay, Isle of 

 Wight, during the third week of July ; it is an extremely active 

 insect, flying with amazing rapidity, and is difficult to capture ; 

 it is also found on the sand-hills at Deal. 



Genus 2. MISCOPHUS. 



Miscophus, Jurine, Hym. 206 (1807). 

 Larra, pt., Panz. Faun. Germ. 106 (1808). 



Head rather wider than the thorax, subquadrate above ; eyes 

 ovate, distant; the stemmata in a triangle on the vertex, each 

 sunk in a fossulet, rather wide apart; the antennae filiform, in- 

 serted at the base of the clypeus ; the clypeus transverse ; the 

 labrum concealed ; the mandibles unidentate, tuberculate within, 

 abruptly widened near their base, the angle of the widened part 

 produced into a strong tooth. Thorax ovate, posteriorly trun- 

 cate ; the anterior wings with one marginal and two submarginal 

 cells; the marginal cell small and subovate ; the first submar- 

 ginal receiving the first recurrent nervure near its apex ; the 

 second submarginal, which is triangular and petiolated, receives 

 the second recurrent nervure near its apex ; the legs slightly spi- 

 nose, the anterior tarsi ciliated outside. Abdomen subovate and 

 subsessile, the apex acute. 



