IDIOCERUS DISTINGUENDUS. 115 



Head, pronotum, and scutellum, umber-brown, with 

 dark streaks separating each of these three parts. 

 Abdomen umber-brown, with a dorsal ridge, and 

 darker somatic rings edged with paler tints. Cauda 

 obvious. Elytra brownish hyaline ; nervures black or 

 brown, disjointed with white, showing the membrane 

 as if streaked with brown bars. Wings greyish, with 

 brown nervures. Legs pale ; hind tibiae with a brown 

 streak. Frons pale ochreous, with numerous streaks 

 placed at different angles. Pigment of the eyes 

 partially deposited on the cornea. 



The figure marked 3, with closed wings, in my plate, 

 is from an insect in Mr. Douglas's cabinet, and marked 

 falcigcr of Boheman. It is yellower than the ordinary 

 form of pcecilus, but the dashes on the elytra well 

 accord with those of that species, and justify its being 

 considered identical. 



I. pmciius may be compared with I. Utiiratus. 



Length, with wings, 0*25 inch, or 6-5 millimetres. 



Idiocerus DISTINGUENDUS, Kivschh. Plate XXXIV., 

 figs. 1 to 1 c. 



Idiocerus distinguendusy Kirschb.; Edw. pt. i. p. 118. 

 ,, cognatus, Fieb., E. B. 455, 10. 



Male. Head dusky ochreous, with six dark dots 

 ranged in a semicircle round the anterior edge of the 

 vertex, and two faint bluish stains on the disc. Pro- 

 notum greenish, with ochreous brown cloudings, with 

 the usual mask-like marks dark brown. Eyes blue- 

 grey. Abdomen pale ochreous-yellow, with a broad 

 grey dorsal patch crosed by black edges of the somatic 

 rings. The apical portion paler. Cauda black, with 

 a yellow tip. Elytra milky white and nearly trans- 

 parent, with a broad and darker limbus. Nervures 

 brown, but disjointed with white, thus appearing to 

 the eye as fine brown streaks on a whitish ground. 

 Wings iridescent. Legs pale and pinkish, with light 



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