BY R. J. T1LLYARD. 



869 



a straight vein with a strong distal fork; a cross-vein connects 

 Cu la with the median cell above it. (Clavus not preserved) . 



Genotype, Chiligcycla scolopoides, n . sp . (Upper Triassic, 

 Ipswich, Q . ) 



This genus is evidently allied to Seytinoptera Handl., but 

 differs from it not only in the remarkable sculpture of the 

 tegmen, but also in the form of the posterior branch of R, 

 which is longer and straighter, the very definite branching of M, 

 with the formation of a definite median cell, and the stronger 

 forking of Cu. 



Chiliocycla scolopoides, n.sp. (Text-fig. 2). 



Total length of preserved portion of tegmen, 6.4 mm., repre- 

 senting a tegmen of about 8 mm. Greatest breadth, 2 mm. 



The area of strong tuberculatum extends from the base out- 

 wards to about the level of the apical end of the clavus, with 

 indications of some tubercles along the veins slightly distad from 

 that level. Examined under a fairly high power, the tubercles 

 are seen to be flat and circular, very closely and regularly ar- 

 ranged, there being three rows of them between the two branches 

 of R, three rows between the posterior branch of R and M, 

 three or four rows between M and C%, and three rows between 

 Cu x and the vena dividens (Cu 2 ) which is mostly obliterated in 

 the fossil. Each tubercle is distinctly raised up above the level 

 of the membrane surrounding it . On most of the tubercles there 

 can be made out, situated at or near the centre of the circle, the 

 impression of a socket of a hair or macrotrichia. Tubercles of 

 this kind are not uncommon on the tegmina of existing Homop- 

 tera, as, for example, on many Membracidae, and in the -Cercopid 

 genus Philagrd, but they are seldom developed over so large an 



a. 



Text-fig. 3. 

 Two small areas from the tegmen of Philagra sp. (Cercopidae) from 

 Mount Tambourine, Q. a, tuberculate area, b, normally pitted 

 area, (x 100). 



