188 ON SYSTEMATIC ZOOLOGY. 
Div. I. Atata. (Ptilota Aristotie.) 
( 1. Lepipoprera. Wings covered with scales, tongue 
spiral. 
2. Exincura. (Neuroptera Z.) Wings four, tongue and 
I. teeth none. (Trichoptera K.) 
GYMNOPTERA. | 3. NEUROPTERA. Wings membranaceous, equal reticu- 
Four wings, < lated; mouth furnished with teeth. 
without wing-| 4 HYMENOPTERA. Wings membranaceous, unequal ; 
cases. nervures mostly longitudinal ; mcuth with teeth. Fe- 
male with a sting. 
5. SrpHoNATA. (Hemiptera LZ.) Wings membranaceous ; 
tongue bent under the breast. (Homopetra Leach.) 
{ 6. DermapreRA. (Hemiptera LZ.) Elytra half mem- 
It branaceous, half coriaceous, crossed. A pair of mem- 
VAGINATA. ee wings, tongue bent under the breast. 
Two wings, ! . Hemiprera. Elytra coriaceous, or semi- crustaceous, 
covered by ~ ialiformn & a pair of membranous wings; mouth with 
two wing- teeth. (Or thoptera Lat.) 
Roe as 8. nee Wings hard and crustaceous, with a 
pair of membranous wings beneath; mouth furnished 
with teeth. 
( 
| 
i 
2 
9, HatreraTa. (Diptera LZ.) Wings two, membrana- 
III. ceous; poisers two; mouth with a tongue, but without 
DIPTERA. teeth. 
Two wings ~} 10. PRoposcipEA. (Hemiptera Z.) Wings two, mem- 
uncovered. | branaceous. Male without either poisers, tongue, or 
| teeth. Female apterous, with a tongue in the breast. 
Div. Il. Aprera. (Aptera L.) 
IV. 
SaLTaToRIA. | 4], Sucrorra. Wings none; feet six; mouth with a 
Undergoing proboscis. (Pulex L.) 
a metamor- 
phosis. 
12. AucENATA. Wings none; feet six ; head and thorax 
Vv distinct. (Hexrapod ‘Apterd, Termes, Psocus. ) 
Gresso 13. ATRACHELIA. Wings none; feet six or more; head 
Badergoine united with the trunk. (Octopod Aptera, Arachnide, 
Crustacea.) 
Boag 14. Crustacea. Wings none; feet fourteen or, more 5 
head separated from the thorax. |(Polypod Aptera, 
Crustacea.) 
(240.) It has been well observed on this system, that 
this great naturalist, — whose merits repose on a much 
more permanent basis than mere classification, — by 
following too strictly the number and substance of the 
organs of flight, has been led to place in different classes 
insects which ought not to have been so separated.* 
He appears, nevertheless, to have been convinced of the 
propriety of Aristotle’s primary divisions of winged and 
* Int. to Ent. vol. iv. p. 443. 
