PSEUDOCOCCUS ACERIS. 179 



extending to the last abdominal segment. Each of 

 the segments with a stout spine, which in life is sur- 

 rounded by curly plates of secretion (fig. 9). Antennas 

 with the last joint longer than the three preceding 

 ones together. Tarsi much longer than tibiae. Anal 

 lobes in life well pronounced, distinct. The male 

 larvae are a little more elongated than those of the 

 females. 



Ova pale yellow or greenish-yellow. 



Habitat. Occurs freely on gorse (Ulex europ&us), 

 elm (Ulmus campestris), horse-chestnut (jEsculus hippo- 

 castanum), laburnum (Gytlsus laburnum), oak (Quercus 

 robur), hawthorn (Crataegus oxyacantha), and lime 

 (Tilia spp.). It is less common on apple (Pyrus), plum 

 (Prunus), mountain ash (Sorbus aucuparia), sweet gale 

 (Myrica gale), and sycamore. 



Mr. Douglas's examples on gorse were first dis- 

 covered by him at Blackheath, and specimens on the 

 same kind of food-plant were subsequently taken by 

 Mr. E. Parfitt at Exeter in 1886-7, and later, in 1889, 

 Mr. Parfitt found the species in the boles of some lime 

 trees, and Mr. Douglas referred it to P. aceris. Douglas 

 himself discovered the examples on elm at Brockley in 

 May, 1886, and described them as new. In 1889 

 Dr. T. A. Chapman took the species on oak at Here- 

 ford. I find it very common in many parts of 

 Cheshire, particularly in the Forest of Delamere. I 

 have found it sparingly also at Oban in Scotland; 

 at Alnwick, Northumberland ; Norwich and outlying 

 districts, and at Bingstead in the same county ; the 

 Cotswolds in Gloucestershire ; and also at Chislehurst 

 and surrounding districts in Kent, in which county 

 Mr. E. E. Green has also met with it. I have received 

 it from Stratford-on-Avon (Hodges) ; and Mr. T. 

 Shepheard has collected it in all stages, on gorse, at 

 Bournemouth. 



My descriptions are taken from a single colony of 

 insects inhabiting a laburnum tree at Chester. 



Distribution. In all probability it occurs through- 



