STATES OF INSECTS. 171 



tacca : probably, therefore, those of the tribe in question 

 lurk in that class ; a suspicion that receives strong con- 

 firmation from the larva of Agrion a , which in its taper- 

 ing body and anal natatorious laminae represents a shrimp. 

 Thelarvae of that very peculiar and distinct tribe, theEphe- 

 merina, appear to be intermediate between the Stomapo- 

 diform and Thysanuriform types. Their natatory respira- 

 tory abdominal laminae seem copied from the former, and 

 their anal diverging setse from the latter b . The Myrme- 

 leonina, as well in their general form as in their motions 

 and habits, present a most singular analogy with the tribe 

 of spiders, as does also in some respect that of Cicindela. 

 With regard to Panorpa, which Mr. MacLeay remarks 

 is related to Mijrmeleon , and is a most ferocious insect d , 

 as its larva has not yet been discovered, nothing certain 

 respecting its analogical form can be asserted; but should 

 it, like the male fly, represent the scorpion, both orders 

 of Arachnida will have their representatives in the class 

 we are considering. The Corydali?ia, as far as the larva 

 of Hemerobius instructs us, is Chilopodiform, but with a 

 tendency to the Araneidiform Type. The Ametabola 

 also furnish the prototype of the next tribe, the Termi- 

 tina, which, as is evident both from Psocus and Termes, 

 are perfectly Anopluriform. The Sialina, or Plicipennes 

 of Latreille, excluding Trichoptera Kirby, appear to me 

 to be intermediate between the Chilopodiform and Stoma- 

 podiform Types, and not without some relation to the 

 Thysanuriform. Their pediform, jointed, respiratory ab- 

 dominal appendages, their head and falcate mandibles, 

 seem copied from the first tribe. The same appendages 



a De Geer ii. t. xxi./. 4, 5. b Swamm. Bibl. Nat. t. xiii./l 1. 

 € Hot: Entomolog. 438. d See above, Vol. II. p. 256. 



