THE LEPTOCORISINAE OF THE WORLD 79 



Coreus varicornis (Fabricius) Burmeister, 1834 : 298 



Myodocha varicornis (Fabricius) Burmeister, 1835 : 325 



Leptocorisa varicornis (Fabricius) Dallas, 1852 : 484 



Leptocorisa (Rhabdocoris) varicornis (Fabricius) Stal, 1873 : 86 ; China, 1924 : 237 



Characterized by claspers which are bifurcated at their apices and by the form of 

 the <$ and $ genitalia. 



o". Body length, 150-160 mm., width, 2-3-2-4 mm. Head length, 1-8-2-0 mm., width, 

 1-4-1-5 mm. Antennae, segment I, 40-50 mm., II, 2-7-2-8 mm., Ill, 30-34 mm., IV, 

 5-7-5-9 mm. Rostrum, segment I, 1-4-1-6 mm., II, 1-4-1-6 mm., Ill, 0-7-0-9 mm., IV, 

 0-7-0-9 mm. Pronotum, length, 2-4-2-5 mm., width, 2-3-2-4 mm. Hind femora, 6-0-6-2 mm. 

 Hind tibia, 68-70 mm. Distance between ocelli, 0-45-0-5 mm., distance between an ocellus 

 and an eye, 0-7-0-75 mm. 



Body cylindrical, palish brown. Head elongated, pale ; occipital suture medially deeply- 

 concave ; paraclypeae long and pointed. Antennae uniformly pale, sometimes tinged with 

 brownish black. Rostrum short, hardly reaching apices of second coxae. Lateral black line 

 represented by only a black dot on either side of collar. Pronotal disc with whitish margins, 

 with black spots on posterior angles. Legs uniformly pale, sometimes slightly darker. Pos- 

 terior margin of seventh abdominal tergum truncate ; pygophore rounded and small (Text- 

 fig. 267). 



<£ genitalia : Claspers bifid at apices (Text-fig. 198) ; dorsal and ventral pairs of thecal 

 appendages present ; ventral thecal appendages symmetrical as in Text-fig. 268 ; left lateral 

 conjunctival appendage reduced, spine-like ; frontal conjunctival appendage with a distinct 

 posterior sclerite ; two right lateral conjunctival appendages as in Text-fig. 268, second tri- 

 lobed ; dorsal membranous appendage with a pointed terminal and bilobed dorsal conjunctival 

 appendages as in Text-fig. 268. 



$. Very similar to o* in colour and measurements ; seventh abdominal sternum emarginate, 

 with a very small median triangular projection (Text-fig. 269). 



$ genitalia : First gonocoxae small, outer margins sinuate, apices rounded (Text-fig. 240) ; 

 six pairs of intervalvular sacs (Text-fig. 272) ; spermatheca irregular, with a median flange and 

 a long coiled tube (Text-fig. 226). 



Type material. Holotype of Cimex acutus Thunberg, without any data (abdomen 

 and antennal segments missing), Zool. Inst., Uppsala ; neotype^, Malaya : " Cimex 

 acutus Thunb. " " with Star's label " " sec. Mus. Thunb. ", Riksmus. Stockholm ; 

 holotype <$ of Gerris varicornis Fabricius, without any data (Jrassquebana, Dalldorff. 

 Mus. Jondlund), Zool. Mus. Copenhagen ; holotype^ of Gerris angustata Fabricius, 

 without data, labelled " angustata ", Zool. Mus. Copenhagen. 



Other material. India : 41 <$, 23 $ ; Pakistan : 2 J, 1 $ ; Burma : 3 £, 2 $ ; 

 Bhutan : 21 <J, 15 $ ; Vietnam : 113 <$, 114 $ ; Formosa : 1 $ ; Hongkong : 

 1 cS, 1 ? ; Thailand : 317 $, 119 $ ; Malaya : 12 <£, 8 $ ; Sumatra : 1 <$ ; 

 Sarawak : 17 <J, 11 $ ; North Borneo : 187 <$, 207 $ ; Philippine Islands : 

 4 <$, 4 $ ; New Guinea : 218 $, no $ ; New Britain : 1 <$ ; New Ireland : 

 18 3, 15 ? ; Australia : 55 <$, 56 $ ; Solomon Islands : 54 <$, 25 $ ; New Cale- 

 donia : 2 o*> 2 $ ; New Hebrides : 4 £, 3 $ ; Fiji Islands : 118 (J, 137 $ ; Sa- 

 moan Islands : 194^, 115 $. 



This species is a major pest of paddy crops and is found in all rice growing regions 

 of the Far East countries. It is very common in India (U.P.) (and here it is known as 

 " Gandhi bug "), Sarawak, and New Guinea. Its range extends in the west into 



