94 POPULAR ENTOMOLOGY. 



very large ; body long, depressed, and pointed ; wings extended 

 horizontally in repose. 



LIBELLULA DEPKESSA (Plate IV.), Dragon Fly, is of a 

 yellowish-brown colour with two yellow lines on the thorax ; 

 the body is brown or grey,, with the sides yellowish ; the 

 wings are transparent, with a large spot of brown at the 

 base ; length about an inch and a half ; the sexes are often 

 of different colours, the males having the body lead-blue, 

 whilst the females are rich yellow-brown; in the genus 

 Agrion (which some authors make a sub-family) the males 

 are of a rich blue, with black wings, the females a fine 

 green with colourless wings ; the body is also rounded and 

 much more slender. 



HYMENOPTERA. FOEMICID^E. 



POEMICA. 



Generic Distinctions. Antenna inserted near the middle of the 

 front part of the head ; mandibles strong, triangular, and dentate ; 

 wings large and unequal ; sting wanting. 



FORMICA RUFA. Red Ant. The neuters are blackish, with 

 part of the head and thorax fawn-coloured ; the female has 

 the thorax oval and fawn-coloured, and the body black ; the 

 males and females are about four lines in length, the neuters 



