6i2 CORIXINA. 



Ahdonisii above black ; Cjunexiuuin clear pale yellow ; beneath 

 pale yellow, iathe(;J t'le fii'sfc -i or 5, iut'u ? 2 or 3 soj'uents, black. 

 Len":fch, 2}. lines. 

 Common in the Cambridge Pea3 {G. B. Crotch). 



Species 18. — Corixa Douglasi. 



CoRiSA DouGL-VSl, FieO. (in litt.) 



" Above black, entirely rastrate, with yellowish-white lines. 

 Pronotwm not prolonged, with G— 7 lines, the hinder ones curved, 

 the 2 middle ones united outwardly into one. Clavus on the basal i 

 with 6 — 7 straight, horizontal lines, shortened from the scutellar 

 angle downwards ; posterior ^ with short, inteiTupted, somewhat 

 undulating, jagged, fine lines and spots. Cormm with narrow, 

 somewhat jagged and undulating lines, here and there broader at the 

 end and shortened towards the margin, inwardly shortened, a longi- 

 tudinal broad dark space, in which is a row of fine pale dots ; line of 

 the membrane-suture narrow, whitish, inwardly shortened; on the 

 apex of the corium reaching to the dusky margin. Menibrane with 

 fine, interrupted, undulating lines, distant on the middle, parallel on 

 the inner margin. Abdomen above black-brown; Oonnexivum and 

 posterior segments yellowish-white. 



"3| lines. ^-^ Pales broad, long semioval, at the base 

 broad ; tibice short, thick, clavate. Frontal depression shallow, 

 flattened towards the top, reaching to about the angles of 

 the eyes. Underside yellowish-white ; the xyphus short, almost 

 cordate, convex, at the end channel formed, base brown. Middle 

 of the Sternum under the coxse, and the pleurae on the suture, 

 narrowly black. Lobes of the p}'oster}m}n of equal width 

 throughout, in front obliquely rounded. The first 2 segments 

 of the abdomen and the 3rd on the base blackish. 



" Allied to C.fossai'um ; resembles it in markings, but has difiierent 

 xyphus and paloe, the latter very like those of C. distincfa.^' 



A single specimen taken in the Cambridge Pens, by Mr. G-. E. 

 Crotch, and sent to Dr. Fieber for determination, has been named 

 and described by him as above. 



Note. — Corixa striata, stagnalis, lateralis, and dorsalis, four 

 British species, described by Dr. Leach in the 12th vol. of the 



