ENTOMOLOGICAL INTELLIGENCE. 
63 
Burmelster,'^ Zetterstedt,f Van Heyden^ and especially of 
Dr. Th. Hartig,§ have, by degrees, contributed considerable 
materials towards the knowledge and classification of these insects, 
and we have now a volume upon the family, from the pen of 
M. Kaltenbach, of Aix-la-Chapelle. 
An introduction of 40 pages gives a general account of the 
structure, physiology, and habits of these insects; which, accord¬ 
ing to their mode of generation, form three principal groups. 
1. Vivi-oviparous (G. Aphis and Lachnus). 
2. Oviparous (G. Chermes, Phylloxera Vacuna ?) 
3. Viviparous (G. Tetraneura, Pemphigus, Schizoneura, and probably the underground 
genera Forda, Rhizobius, Paracletus, and Trama), 
These genera are characterised in the following tabular distribu¬ 
tion :— 
1. Abtheilung. Winged species, Blattlause. 
Fore-wings with a biramos ecubitus : 
Antennai 7-jointed, long .... 
6-jointed, short .... 
. 1 G. Aphis. 
. , 2 G. Lachnus. 
Fore-wings with a l-ramose cubitus : 
Autennse 6-jointed, &c. .... 
‘‘ 5-jomted, &c. ..... 
. • 3 G. Schizoneura, 
. . 4 G. Vacuna. 
Fore-wings with a simple cubitus. 
Fore-wings with 4 oblique veins, antennae 6-jointed. 
Hind-wings with 2 oblique veins . 
with 1 oblique vein . 
. . 5 Pemphigus. 
. . 6 Tetraneura, 
Fore-wings with 3 oblique veins, &c.: 
Antennae 5-jointed, &c. .... 
“ 3-jointed, &c. 
, . 7 G. Chermes. 
2. Abtheilung. Wingless subterranean species, Hj’ponomeutes. 
Autennse 6-jointed. 
Last joint of antennae thick, longer than the preceding . 9 G, Rhizobius. 
“ “ slender, shorter , 10 G. Forda. 
Antennae 7-j^^nted, last joint very small: 
Hind tarsi long and jointless ..... 11 G. Trama. 
“ “ two-jointed.12 G. Paracletus. 
Of the genus Aphis L. 119 Species are described : 
Lachnus. Ill. 13 species . . (Aphis QuercAs, Linn., A. Roboris, Linn. 
&c. G. Cinara, Curtis). 
Schizoneura, Hart. 6 species . . (Aphis lanigera, Ulmi, &c.) 
“ Vacuna, Van Heyd. 2 species . (A. dryophila, Schk. and a n. sp.) 
^ Pemphigus II, Hart., 7 species • (A, bursaiius, L, &c.) 
Tetraneura, Hart., 1 species . (A. Ulmi Degeer). 
Chermes^, Linn., 4 species • . (Ch. Abietis, Linn, &c.) 
* Handb. d. Ent., vol. ii, -|- Inaecta Lapponica. In Museum Seckenb, 
§ In Germar's Zeitschrift, vol. iii. 
H The name of Brysocrypta Haliday (Westw. Gen. Synopsis, Brit, Ins,, p, 118), must 
be retained for this genus. 
^ I consider that the name, Adelges Vallot, ought to be given to this genus. 
