i88 



Microscopical Essays. 



The Genera Infe&orum of Linnaeus, exemplified by various 

 Specimens of Englifh Infects, drawn from Nature, by James 

 Barbut. 



Clafs the firft. Cole Optra. The infe6ls of this clafs have 

 four wings ; the upper ones, called the elytra, are cruftaceous, 

 formed of a hard bony fubflance, which, when {hut, form a 

 longitudinal future down the back, as in the fcarabasus, melolon- 

 tha, or cockchaffer, &c. &c. 



2. Hemiptera, Thefe have alfo four wings ; but the elytra 

 are different, being half cruftaceous, half membranaceous : the 

 wings do not form a longitudinal future, but extend the one over 

 the other, as in the gryllus, grafshopper, &c. 



3. Lepidoptera. Thofe which have four membranaceous 

 wings covered with fine fcales, as the butterflies and moths. 



4. Neuroptera. Thefe have four membranaceous tranf- 

 parent wings, which are generally reticulated, as in the libellula, 

 or dragon flies. 



5. Hymenoptera. Thefe, like the preceding clafs, have 

 four membranaceous wings ; but the abdomen is furnifhed with a 

 fling, as in the bees, wafps, Sec. 



6. D 1 p t e r a . Thefe have only two wings , as common houfe 

 flies, gnats, <&c. 



