GEOMETERS. 



89 



shining black warts, each of which emits from 

 the summit a single black bristle ; four of 

 these warts are ranged in a transverse series 

 on the back of the second, third, and fourth 

 segments, and four of them in a square oil 

 the back of the fifth and following segments, 

 and three in each yellow mark on the side 

 form a triangle which comprises the spiracle ; 

 claspers lead-coloured. It feeds on the common 

 gooseberry, and changes to a CHRYSALIS in a 

 slight web attached to some of the leaves. 



This MOTH is rather common in our English 

 gar Jens, and also in Ireland; it flies in July. 

 (The scientific name is Media wavaria.) 



208. The Rest-harrow (Aplasta ononaria). 



208. THE REST-HARROW. The antennae of 

 the moth are perfectly simple and setaceous 

 in both sexes; the fore wings are rather 

 pointed; the hind wings rounded, but truncate 

 at the anal angle : the colour of the wings is 

 dull ochre, thickly irro rated with brick-red 

 dots, and having a scarcely perceptible median 

 shade common to them all, and due to the 

 crowding of the clots ; thehind wings are rather 

 paler than the fore wings; the underside has 

 the median shade more distinctly marked than 

 the upper side : the sexes are alike. 



The CATERPILLAR occurs in April and Sep- 

 tember 011 the rest-harrow (Ononis spinosa), 

 the only plant 011 which it has been known 

 to feed : it is extremely sluggish, and never 

 leaves its food-plant : it is short, fusiform, 

 obese, and without tubercles, and is entirely 

 covered with short stiff hairs ; its colour is 

 'pale dark green, with a darker medio-dorsal 

 stripe, and a paler but indistinct spiracular 

 stripe. When full-fed it spins a cocoon on 

 the surface of the earth amongst moss, and 

 therein undergoes its change to a CHRYSALIS. 



The MOTH appears on the wing at the end 

 of May, and again in July and August. It 

 has been taken in the Warren, at Folkestone, 

 in July. (The scientific name is Aplasta 

 ononaria.^ 



209. The Latticed Heath (Strenia clatlirata) . 



209. THE LATTICED HEATH. The antenna? 

 are nearly simple in both sexes. The wings 

 are rounded, and of two colours, smoky-brown 

 and dingy white ; the dark colour is arranged 

 in five broad transverse bands on the fore 

 wings, and four on the hind wings ; these 

 bands are very irregular, and very different in 

 different individuals ; the wing-rays are of the 

 dark colour, and crossing the bands at right 

 angles divide the white portions into a number 

 of squareish white spots, giving to the entire 

 surface of all the wings somewhat the appear- 

 ance of lattice-work, whence the name ; the 

 fringe of all the wings is a most beautiful 

 object, the dark brown colour alternating 

 in square spots with other square spots of a 

 most lovely pearly whiteness ; the antennre 

 are ringed with dark brown and yellowish- 

 white ; the head, thorax and body are dark 

 brown sprinkled with yellowish-white ; the 

 body having seven slender belts of a pure 

 and delicate white. 



We learn from Guenee that the CATER- 

 PILLAR has a green head with a white line on 

 the face ; the body is rather pale green, with 

 a double white medio-dorsal stripe bordered 

 with darker green ; on each side is a similar 

 stripe, and below the spiracles, which are 

 white and delicately bordered with black, is 

 another white stripe bordered above with a 

 line of black dots ; ventral surface green, 

 with four white lines. It feeds chiefly on 

 trefoil and saintfoin almost throughout the 

 year, but principally in spring and autumn. 



CATERPILLARS that feed on the various 

 species of trefoil and grasses, may be obtained 

 abundantly by using the sweeping net at 

 night. 



The MOTH flies in May and June, and is 

 common in clover-fields and on heaths in 

 England and Ireland. (The scientific name 

 is Strenia clathrata.) 



