234 Mr. W. L. Distant on a new Genus of Cicadidae. 



to be found in Periplaneta and Blahera on the second abdo- 

 minal segment ; here the secondary transverse line * is 

 interrupted in the middle, and only an indistinct demarcation 

 of the median shield is to be recognized. 



The peculiarities of the formation of the ventral plau 

 above described in Phyllodromia are in correspondence with 

 the remarkable condition of the ventral covering of the abdo- 

 men of Machilis, in which paired duplicatures which may be 

 raised for half their length are united by flat anterior median 

 shields. 



Thus we get a fresh proof of the relationship of the Cock- 

 roaches with the Thysanura, which at the same time indicates 

 that the ventral plates of the Hexapoda do not represent 

 sternal shields of the same class any more than they corre- 

 spond to the ventral shields of the Ohilopoda, but that they 

 are produced by the amalgamation of paired abdominal leg- 

 rudiments flattened into plates with an unpaired median 

 shield. 



XXXV. — Description of a new Genus of the Ilomopterous 

 Family Cicadidee. By W. L. Distant. 



In a collection of Rhynchota made in the JNTaga Hills by 

 Mr. William Doherty, and which has just reached my hands, 

 I was surprised and delighted to find another gorgeous addi- 

 tion to our knowledge of the Indian Cicadidse, which again 

 requires fresh generic subdivision. It is allied to the genus 

 Potyneura; and as I have already passed that portion of the 

 family in my Monograph, I describe it here and will subse- 

 quently figure it in the Appendix to my work. 



ANGAMIANA, gen. nov. 



Body robust and elongate, broad and somewhat flattened. 

 Head small, including eyes much narrower than pronotum, 

 and narrower than base of mesonotum ; ocelli much wider 

 apart from eyes than from each other; face convex, slightly 

 prominent above. Pronotum with the lateral and posterior 

 margins very broad, the lateral margins strongly arapliated 

 and obscurely angulated. Anterior femora distinctly and 



* This fine transverse line, which divides the ventral shields of the 

 abdomen into ventral plates and anterior shields, only originates later 

 from the coalescence of delicate transverse wrinkles of the chitinous skin 

 which is still soft. 



