50 SUPPLEMENT. 



much shorter than the body ; hind tibiae as long as the hind femora. Hind 

 wings pellucid, somewhat shorter than the fore wings; veins pale. Length 

 of the body 16 lines; expansion of the fore wings 49 lines. 



In this species and in the following one the prothorax is shorter and 

 is less attenuated in front than that of T. nasuta and its allies, and has not 

 an angular hind border. 



a. China. Presented by G. T. Lay, Esq. 



TbYXALIS DIM1NUTA. 



Mas. Pallide teslacea, gracillima, subtricarinata ; caput vix ascendens, 

 prolhorace pau/lo longius ; prothoracis margo posticus fere rectus ; 

 alee posticce diaphance, pallida- venosee. 



Male. Pale testaceous, very slender. Head and prothorax with 

 three very slight keels. Head a little longer than the prothorax, hardly 

 ascending, forming an elongated cone in front of the eyes. Prothorax with 

 two very slight transverse impressed lines; fore border, sides and hind 

 border nearly straight. Hind femora much shorter than the body ; hind 

 tibiae somewhat shorter than the hind femora. Hind wings pellucid, much 

 shorter than the fore wings; veins pale. Length of the body 10 lines; 

 expansion of the fore wings 19 lines. 



a. China. Presented by G. T. Lay, Esq. 



Page 500. 



Pyrgomorpha rosacea. 



Mas. Teslacea aut viridis ; caput prolhorace brevius,fastigio subcarinato, 

 f route perobliqua ; prothorax tricarinatus, margine postico rotundato ; 

 femora poslica corpore breviora; alee anticce fusco unistrigatce ; alee 

 posticce rosea. 



Male. Testaceous or green. Head very slightly ascending, shorter 

 than the prothorax ; lip of the vertex conical, with a very slight keel ; front 

 very oblique, with four distinct diverging keels. Prothorax with three 

 well-defined keels and with two very slight transverse impressed lines; fore 

 border and sides straight ; hind border rounded. Hind femora shorter than 

 the body; hind tibiae a little shorter than the hind femora, their spines 

 very minute. Fore wings with a brown streak extending from the base in 

 the disk. Hind wings rosy. Length of the body 10 — 13 lines ; expansion 

 of the fore wings 1 6 — 20 lines. 



Closely allied to P. rosea ; the fore wings are more rounded at the 

 tips and the hind wings are more wholly rosy. 



a, b. South Africa. Presented by Sir A. Smith. 

 c. Natal. From M. Gueinzius' collection. 



Page 506. 



Genus 9. PERENA. 



The longer and more ascending head and the thin broad oblique spine 

 of the prosternum distinguish this genus from Opomala. 



