1887.] E. T. Atkinson — Notes on Indian Rhynchota. 145 



matter is, it seems to me, that the property discovered must belong to 

 the curve with which alone we are concerned, and must also be repre- 

 sented by the differential equation to be interpreted. We miss the 

 mark, if we bring in any other curve which is totally foreign to our 

 purpose. I believe, then, that though the theorem enunciated by 

 Professor Sylvester is perfectly correct, it is not the geometrical inter- 

 pretation of the Mongian equation as contemplated by Boole; what 

 Boole sought for in vain, has yet to be discovered. 

 20th June 1887. 



XII. — Notes on Indian Rhtnchota, Heteroptera, No. 2. 

 By E. T. Atkinson, B. A., President. 



[Received May 25th, 1887i:— Reed June 1st, 1887.] 



Fam. Pentatomid^. 



Subfam. Scute llerina, Stal. 



En. Hem. i, p. 4 (1870) ; iii, p. 3 (1873) : — Scutellerides, Pachycorides, Tetyyrides 

 and EurygastrideSf pt, Am. & Serv., Hist. Nat. Ins. Hem. pp. 25-51 (1843) : — Praan- 

 guli pt, Amyot, A. S. E. F. (2 s.) iii, p. 401 (1845) : — Pachycoridoe and Eurygas- 

 tridce, Dallas, List Hem. i, p. 3, 43 (1851) ; Walker, Cat. Het. i, p. 1, 61 (1867) :— 

 Scutelleriday Stal, Hem. Afric. i, p. 32, 33 (1864) ; Hem. Fabr. i, p. 9 (1868). 



Primary and subtended veins of wings distant, including a broad 

 area in the middle : hamus present : scutellum very large, without 

 frena. 



Div. Elvisuraria, Stal. 



Meso- and meta-sternum with two high wrinkles or ridges, those on 

 the former higher forwards : thorax and scutellum at base, together 

 gradually convex; thorax, at base, produced hindward between the 

 basal angles of the scutellum : second joint of rostrum much shorter 

 than the two apical joints taken together, and a little longer than the 

 apical joint : venter furrowed, without stridulatory strigose spots, in- 

 cisures gradually curved on the disc. 



Genus Oxtprymna, Stal. 



En. Hem. iii, p. 5 (1873) -.—Elvisura, Stal (nee Spinola) Hem. Afrio, i, p. 35 

 C1864.) 



Venter with a distinct broad furrow continued through it : scutellum 

 with a small spine at the apex. In Elvisura ^ the spine is wanting. 

 19 



