The Zoologist— Februarv, 1870. 1999 



short; tips of llie tibiuE; and of ihe tuisi black, Sepleniber.— Most of the Aphides 

 black; some green, mottled with darker hue; some pale green or pale yellow, wiih 

 black nectaries, which are shorler than those of the normal form ; their bodies also are 

 more globose. The ofifspring of the lasl-menlioned variety are generally but not 

 always dingy, and unlike it in colour. In Oclober il is much more numerous, and of 

 all colours from pale green or yellow; the young are often reddish green. The winged 

 females have a black offspring. Towards the end of October nearly all the Ai)hides 

 were dark green; a few were pale green, and the winged male paired with the latter. 

 In November all were dark green. In August some occurred of a dark green colour, 

 with transverse white streaks on each side of the body, and with black nectaries. 



A. Genista (S. S. 1298). — I believe that this and A. Laburni are identical, though 

 the latter is more shining, especially in the disk of the body. A much smaller Aphis 

 that dwells on the furze may be termed A. Ulicis. It is sometimes like A. Laburni in 

 colour, sometimes like A. Rumicis. 



A. Euphorbia (S. S. 1298).— The Aphis that occurs on the Spurge in England 

 seems to be a variety of A. Rumicis. The apterous female is black and dull. Autennse 

 white, black towards the tips. Legs while; tarsi black. The nectaries are shorter 

 than those of A. Laburni and of A. Genistse, and it does not equal the former in 

 size. 



A. terricola (S. S. 1299).— This species and A. terricola described by me live under 

 ground in the apterous state. The latter species feeds on the root of the parsnip, and 

 it occurs at the depth of one foot beneath the surface of the ground, to which it crawls 

 when it is about to assume the winged state. 



Siphoeoryne Fceniculi (S. S. 1300). — It abounds on fennel in gardens, and is 

 smaller than S. Capreae, which it much resembles, and these two species may con- 

 stitute a new genus, being very different in structure from S. Xylostei, the type of 

 Siphoeoryne. 



Myzocallis Quercus (S. S. 1300). — This species appeared in unusual abundance 

 during the summer of 1869. It is one of the few species of Aphidids that I observed 

 in the Channel Isles and in the Isle of Man. The genus Myzocallis should be re- 

 stricted to M. Quercus, M. Quercea and M. Coryli. M. Ononidis is the type of a new 

 genus, which I have named Therioaphis. 



Chaitophorus saiicivora (S. S. 1300).— The winged form of this species occurs in 

 Italy, but I have never found it in this country. Il chiefly abounds in the autumn, 

 and varies in colour, being pale yellow or pale green, with brighter marks. Tiie male 

 and the oviparous female appear in October; the former is hardly mure than one- 

 fourth of the size of the latter, and is distinguished by a stripe of brown and black 

 streaks. It is very different in structure from C. Aceris, which is the type of Chaito- 

 phorus, and will form a new genus, which I have named Tranaphis. 



Ckaitophorus Aceris (S.S. 1300).— C. Acericola is probably an especially southern 

 form of C. Aceris. Some examples of it occurred in a year that was very favour- 

 able to the development of Aphididae. At luterlacken, in Switzerland, it was 

 generally prevalent to the exclusion of C. Aceris. The latter is remarkable on account 

 of the widely different forms which it assumes, and also on account of the suspension 

 of growth in the young of the third generation. The noiinal form appears in the 

 early part of the year and also in July, and with it in the latter month I have observed 

 on the same leaf the little flat form with laminse round the abdomen. The variations 



