1 907-] 



\V< x )D \V \si-s. 



103 



The Genus Xiphydria. 



The two species of Xiphydria have aot (ill now proved them- 

 selves of much importance ill forestry. Xiphydria dromcdanus 

 has had its larva} recorded in Britain from willow, and on the 

 Continent from willow, poplar, and birch. There is a further 

 record of importance of the destructive work of the drome- 

 darius larvae on mountain or YVych elm in the neighbourhood 

 of Munich. 



Description of the Insect. — The head and thorax are black with 

 white spots and markings ; the coxae are black and the legs 

 reddish-yellow, with the points of the feet dark brown. 



TUNNEL IN UltUUS montatta, 1 HE WORK OF THE LARVA OF Xiphydria dromtdarius. 

 SEVERAL PLIGHT-HOLES ARE ALSO SEEN IN THE BARK.— (AFTER 

 LBI9BWITH). 



In the fern, ile the fust two rings of the abdomen are black, 

 the thud is red, the fourth and fifth are red with a white 

 spot at each side, tin* sixth i> nd with variable marking, the 

 seventh varies 111 colour and marking, the eighth also varies in 

 colour but has on each >ide a broad white stripe, and the ninth is 

 black. In the male the two last lings of the abdomen are black, 

 rings 3, 5 and 0 an- red, while 7 varies between red and black. 

 Rings 3 to 8 have on each side a white spot. 



The female measures in length, including the ovipositor, from 

 \z to lb mm., and in wing-span 10 to jo mm. The male 



