1815.1 Geological Society. S09 



Ordbr VII. Diduoptera.—Wwgs longitudinally folded twice 

 or more ; elytra coriaceous, nervous, one decussating the other ob- 

 liquely. . 



Sibhonosloma.—'MoVii\^ with an articulated rostrum. 

 Order VIII. i/em/p/era.— Elytra somewhat crustaceous, or 

 coriaceous; towards the apex generally membranaceous, hori- 

 zontal, one decussating the other obliquely. Metamorphoses half 



complete. 



Order IX. Onio/j/em.— Elytra entirely coriaceous, or membra- 

 naceous, and meeting obliquely, with a strait suture. Metamor- 

 phoses semi-complete, or incomplete. 



Century II. Medaynoptera. — Insects without wings or elytra. 



Order X. Jptera.— Mouth with a tubular sucking rostrum. 

 Metamorphoses incomplete. 



Century III. Gymnoptera.— Insects with wings, but no elytra. 



CoHORS I. Glossostoma.— Mouth with a spiral tongue. 



Ordkr XI. Lepidoptera.—V/ii\gs four, membranaceous, with 

 pterigostea, covered with meal-like scales. 



CoHORS II. Gnathustoma. — Mouth with maxillas and lip. 



Order XII. Trichopteia.—Wmgs four, membranaceous, with 

 pterigostea, and hairy. 



Co'noRS III. Odontostoma.— Mouth with mandibules, maxillae, 



and lip. , , . 



Order XIII. Neicroptera.— four highly reticulated wings, gene- 

 rally equal in size; anus of the female without a sting, or com- 

 pound borer. 



Order XIV. Hymenoptera.— Four venose wings, hinder ones 

 smallest; anus of the female with a sting, or with a compound 

 borer or oviduct. 



CoHORS IV. Siphoiwstoma.— Mouth tubular, formed for sucking. 



Order XV. Diptcra.—-Wmgs, and haltares or balancers two. 



At the meeting of the 21st of March, a paper containing some 

 additions to the Novi Systematis Ornithologici Prolusio, by M. Vieil- 

 lot, concluded at a former meeting. 



GEOLOGICAL SOCIETY. 



Jan. 20, 1S15.— The reading of Dr. Macculloch's paper on 

 Glen Tilt was concluded. 



The remarkable appearances attending the junction of the gra- 

 nite and of the schistose rocks at Glen Tilt were first pointed out by 

 Dr. Hutton, and were considered by him as affording strong proofs 

 of the original fluidity of granite, and of its having forcibly in- 

 truded itself into the situation which it now occupies at a period 

 gulisequcnt to the formation of the schist with which it is intermixed. 



The supporters of the VVcrnerian theory who have visited this 

 r«;markal)le valley have denied the accuracy of some of Dr. Hutton's 

 descriptions, and Imv.' called in question the justness of the conclu- 

 tions deduced bv iiiin I'rutri these Hp|)earances. Tlie advocates for 

 Dr. Hutton's theory have brought forward counter statement?. 



