(2) H 



BY R. J. TILLYARD. 879 



length from the base, or less. The whole tegrnen is covered with 

 irregularly placed patches of small tubercles, very definitely pre- 

 served in the fossils, and apparently originally pigmented; these 

 give a very definite pattern to the tegmen, and are of quite a 

 unique appearance. Between these patches, the tegmen is finely 

 pitted all over, the pits being shallow and placed farther apart 

 than are the tubercles in the patches, and evenly aligned along 

 the courses of the main veins. 



Genotype, Ipsvicia jonesi, n.sp. (Upper Triassic, Ips- 

 wich, Q.) . 



Three species of Ipsvicia are represented in the Ipswich 

 Beds. They may be separated by the following key: — 



f Apex of tegmen sharply pointed. /. acutipennis , n. sp.' 



*• ' \ Apex of tegmen broader and more rounded. 2. 



' M and Cu united for a distance distinctly less than the width of 

 the space between R and the costal border above it. Tubercular 

 patches distinct and well separated. 



1. maculaia, n. sp. 



M and Cu united for a distance slightly greater than the width 

 of the space between E and the costal border above it. Tubercular 

 patches larger, some of them more or less confluent. 



1, jonesi, n. sp. 



Ipsvicia jonesi, n.sp. (Text-fig. 13). 



A complete and beautifully preserved tegmen, representing the 

 mould of a left tegmen, and therefore having its apex to the 

 right (1A stands on a high ridge in the fossil, whereas in the 

 actual wing it lies in a deep furrow) . 



Total length, 14.2 mm. Greatest breadth, 5.6 mm. 



Veins of the clavus distinct, those of the rest of the tegmen 

 faint, becoming very indistinct distally, so that their terminal 

 branchlets cannot be made out with certainty. (This is not due 

 to faulty preservation, but is the actual condition of the vena- 

 tion in the insect, as in the case of Philagra and other Fulgoroids, 

 in which the membrane of the tegmen has become much thick- 

 ened) . Sc, R, M and Cu are well-marked from the base to 

 their point of union, from which a transverse vein runs upwards, 

 very distinctly, to the costal border. Costal border coriaceous, 

 wide and strongly built . Between it and R there are altogether 

 nine weakly-indicated cross branches, besides the one already 



