affecting the Potato-crops. 



79 



manner ; but the perfect insects, which emerge from the matured 

 pupae, can fly well, are exceedingly active, leaping by short flights 

 and tumbling about in the sunshine, so that it is difficult to cap- 

 ture these fragile creatures, especially without mutilating them. 

 They were abundant from the middle to the end of August in 

 1846 and 1847. 



12. L. contaminatus, Fallen, is very similar in size and form 

 to the foregoing species (fig. 22 ; 23, natural size ; fig. 24, the 

 head, Sec, in profile). It is ochreous, the base of the thorax and 

 the elytra inclining more or less to green, and the membrane is 

 margined with a smoky colour; but it varies considerably, some 

 having a dark spot at the base of the stigma, forming a bar across 

 when the elytra are closed ; the suture is also brown, as well as 

 the nervures of the wings, and a patch on the back of the abdo- 

 men. It is 3 lines long : the wings expand 5J. 



This species was abundant on my potato-crop in August, 1846, 

 and it abounds on lime-trees from the beginning of May to the 

 middle of August, or later. 



13. L. bipunctatus, Fallen (fig. 25 ; 26, natural size), is a more 

 robust insect. It is green, more or less ochreous when dead : 

 the horns are stoutish, ferruginous, dusky at their extremity, with 

 a pitchy spot beneath the first joint towards the base ; the ros- 

 trum, in repose, extends to the hinder coxae, and is pitchy at the 

 tip. In some varieties there are 2 black dots on the disc of the 

 trunk, and it is ochreous before : back of abdomen shining black, 

 with the lateral margins pale : elytra with depressed black hairs, 

 and generally with indistinct stripes or splashes of brick-red ; 

 membrane smoky : wings ample, smoky, with darker nervures : 

 legs stoutish, especially the hinder; thighs ochreous, rusty at 

 their extremities, tips of tibiae and feet pitchy. Length 3| lines, 

 expanse 7 lines. 



This species was very abundant the end of August, 1846, upon 

 the potato-haulm,* as observed by Mr. Balk will and other gar- 

 deners. In summer it is often found on nettles in Ireland and 

 England. 



14. L. umbellatarum, Panzer (fig. 27 ; g, the natural dimen- 

 sions), is a more oval species, with slenderer horns and legs : it is 

 pale green or ochreous, shining, punctured, and pubescent : head 

 smooth, inclining to red ; horns rosy, tip of 2nd joint with the two 

 following brown: thorax rosy behind, and coarsely punctured, 

 smooth before, with a transverse waved channel : scutel white, 

 black at the base, sometimes with 2 longitudinal black or rosy 

 lines next the thorax : body shining black above, margined with 

 ochre : elytra elongate oval, clouded with red, the costa deeply 



* Gardeners' Chron., vol. vi. p. 557. 



