The Iltxagonul St nicture formed in CooUng Beeswax. \'2l 



third joint of niiti'iina^ was gone in liis ty|)e ; in these tliree 

 feujale .s|iecinuns it is the same eolour as the pieeedin^ ones, 

 long and sUmkKt, its iirst annuhition wide, the others tapering 

 off to a point. Walker's type cann(jt be identified iVoni 

 amongst the three females. 



N.H. — The name chri/sopfii/us was used by Macquart 

 (Hist. Nat. Dipt. i. ]). ll'l) for an African species; since, 

 however, clirysophilasj Walker, is dilferentiy derived, both 

 designations may be retained. 



Ilab. Australia. 



'^ Corizonexira crratica, (J, Walker, List Dipt. pt. i. p. 189 

 {164t>). 

 Tabanus erraticus, "Walker, /, c. 



This was ])laccd by Walker among the Talani, but it is 

 distinctly a Fangonia, Latr. ; the eyes apparently bare; it is 

 in very bad condition, the antennaj broken off, one lying on 

 the face. 



Ilab. North or north-west coast of Australia. 



The Fangonia couj'ungenSy ? , Walker (List Dipt. pt. i. 

 p. 140), irom Australia, type, is missing. 



The Favgonia lurida^ ? , Walker, is not a Fangonia at all j 

 it belongs to the Tabaniniu. 



[To be contiuued.] 



XIII. — The Hexagonal Htructure naturally formed in Cooling 

 Beeswax, and its Injluence on the Formation of the Cells of 

 Fees. By Chakles Dawson, F.G.S. &e , and S. A. 

 WOODHEAD, B.Sc, i'.C.S., &c., County Analyst, East 

 Sussex *. 



TllK hexagonal arrangement of the cells of bees has been 

 generally ascribed to a structural instinct. The object of 

 this paper is now to show that the form of the bee-cell is 

 chiefly influenced by a crystalline or pseudo-crystalline 

 hexagonal formation due to the cooling of the wax. 



^^ liile ex))erimenting with waxes and resins, one of us 

 (My. Dawson) noticed that on cooling the mixture had a 

 tendency to arrange itself in hexagonal forms, from wliich 



• Communicfttid by the Aiithurs, liaving beon read at tliu Dover 

 Meetinjr of the 15ritis.h AirSociiition, ltf99. 



