TWO NEW RHYNCEOTA FROM JAPAN. 79 



85 : 12 (?) : 40 (?). Anterior coxa 60, femur 100, tibia 35, tarsus 

 (apparently unisegmentate) 20 ; interrn. femur 146, tib. 175, tarsus 11 

 (10 : 6 : 9), claws 2. Posterior femur 195, tib. 235, tarsus 12 (5 : 3 : 4), 

 claws 2. Total : anterior leg 215 ; interm. leg 345 ; post, leg 455. 

 Length 17 mill. ; width at int. coxai 0'8 mill. 



Japan. Niigata : Sept. 14th, 1881. Mr. Distant's coll. 



Pale luteous, with a broad blackish lateral band on head and 

 thorax. Head with two submedian brownish-black bands ; thorax 

 with a slender crimson median line ; abdomen with one median and 

 one lateral crimson line, obsolete in places. Sterna stramineous, 

 with a broad median and a rather irregular lateral black band, some- 

 what obsolete on the prosternum. Anterior legs sordid flavous, irre- 

 gularly infuscate ; spines whitish, black-tipped ; spinelets blackish. 

 Intermediate and posterior legs fusco -flavous, apical half of femora 

 and basal half of tibiae annulated with brownish-black or brownish- 

 yellow, tarsi blackish. Abdomen rufo-fuscous, mottled with brown and 

 stramineous. 



I have placed this fine species in Ischnonyctes, Stal (a genus 

 hitherto known only from Algeria and Corsica — two species 

 being enumerated in Lethierry and Severin's ' Catalogue,' iii. 

 p. 75, although Puton considers them (1880 and 1886) to be 

 probably the same), as it agrees quite well with Stal's brief 

 description (1874, ' Svensk Vetensk. Ak. Handl.,' 12, no. 1, 

 pp. 94 & 96), except that the surface of /. prcedicato?- appears to 

 me distinctly, though very minutely, granulate. 



2. Gerris lacustfis (Linn.), Stal. 



There is a specimen in Mr. Distant's collection, from Japan, 

 which appears to me to be indistinguishable from ordinary 

 British and French examples of the above species. 



3. Notonecta montandoni, Kirk. 

 Burma, Kuby Mines (collections Distant and Kirkaldy). 



4. Corixa distanti, sp. n. 



Belonging to subgenus Basileocorixa, Kirk., to the group of 

 striata (Linn.). 



Elongate ; pronotum and elytra (membrane excepted) somewhat 

 strongly rastrate. Macropterous. Lateral and posterior angles of 

 pronotum rounded. Metaxyphus long, isosceles-triangular, reaching 

 to about two-thirds of the length of the posterior coxae, rounded 

 basally. Intermediate femur more than twice as long as the tibia, 

 which is one-third longer than the tarsus, claws one-sixth longer than 

 the tarsus. 5 . Palse cultrate. Length 11 mill.; width 3-7 mill. 



Japan. Hako (coll. Distant). 



Pronotum dark brown (lateral margins flavous), with about nine 

 yellow lines, fairly entire (middle lines split). Elytral designs very 

 clear, yellow lines of the corium not divided into series by brown lon- 

 gitudinal lines. Yellow lines of clavus and those at the base of the 



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