THE LEPTOCORISINAE OF THE WORLD 67 



Stenocoris (Oryzocoris) furcifera (Westvvood) comb. n. 

 (Text-figs. 176, 191-196) 



Leptocorisa furcifera Westwood, 1842 : 18 

 Gerris nigricornis Stal, 1870 : 218 syn. n. 

 Leptocorisa nigricornis (Stal) Stal, 1873 : 87 



Characterized by red median longitudinal line on abdominal venter and by the 

 form of <$ and $ genitalia. 



(J. Body length, 14-0-1612 mm., width, 1-8-2-0 mm. Head length, 1-9-20 mm., (length 

 of paraclypeae 0-5-0-56 mm.), width, 1-3-1-4 mm. Antennae, segment I, 3-3-3-6 mm., II, 

 2-20-2-26 mm., Ill, 2-20-2-26 mm., IV, 3-7-4-0 mm. Rostrum, segment I, 1-3-1-33 mm., II, 

 1-3-1-33 mm., Ill, 0-6-0-63 mm -. IV, 0-6-0-63 mm. Pronotum, length, 2-4-2-6 mm., width, 

 1-8-2-0 mm. Hind femora, 5-73-6-0 mm. Hind tibia, 6-5-7-1 mm. Distance between 

 ocelli, 0-46-0-5 mm., distance between an ocellus and an eye, o-6-o-66 mm. 



Body usually greatly elongated, linear and usually pale unicolourous. Head about half as 

 long again as broad ; occipital suture medially concave, arms curving outwards towards 

 sides ; paraclypeae short, about one-third length of head, thicker at bases and thinner at apices. 

 Antennae pale, with apices of each segment (except fourth) black, fourth light red, second and 

 third usually subequal. Rostrum very short, usually not reaching second coxae. Lateral 

 black line faint, extending from sides of antenniferous tubercles on to collar. Pronotal disc 

 usually pale unicolourous, sometimes with greenish tinge posteriorly ; posterior angles without 

 black spots, although sometimes trace of brownish spot present. Legs pale unicolourous. 

 Hemielytra with both anal and medial veins prominently black. Abdomen with dorsum, 

 excluding connexiva, red, venter palish red with a median longitudinal red line, this line some- 

 times faint. Posterior margin of seventh abdominal tergum slightly medially concave ; pygo- 

 phore smoothly tapering posteriorly ; posterior processes rounded, directed backward (Text-fig. 



195)- 



<J genitalia : Claspers crossed regularly over pygophore, not curved at apices (Text-fig. 

 176, A) ; dorsal thecal appendages absent, ventral pair as in Text-fig. 191 ; four left lateral 

 conjunctival appendages as in Text-fig. 191 ; frontal conjunctival appendages paired, minute, 

 almost of equal length ; four right lateral conjunctival appendages, with second almost straight 

 as in Text-fig. 191 ; dorsal appendages as in Text-fig. 191. 



$. Body length, 17-66-18-66 mm., width, 2-0-2-26 mm. Head length, 1 86-20 mm., 

 width, 1 -4-1 -5 mm. Antennae, segment I, 3-3-3-73 mm., II, 2-2-2-26 mm., Ill, 2-2-2-26 mm., 

 IV, 3-3-3-8 mm. Rostrum, segment I, 1-3-1-33 mm., II, 1-3-1-33 mm., Ill, 0-63-0-7 mm., IV, 

 0-63-0-7 mm. Pronotum length, 2-5-2-66 mm., width, 2-0-2-26 mm. Hind femora, 5-33- 

 5-7 mm. Hind tibia, 6-o-6-i mm. Distance between ocelli, 0-46-0-5 mm., distance between 

 an ocellus and an eye, 0-66-0-7 rnm. 



Distinctly longer than <J ; posterior margin of seventh abdominal sternum with a median 

 split, forming concave lobe on either side (Text-fig. 192). 



$ genitalia : First gonocoxae comparatively narrow, leaving a portion of eighth paratergite 

 unconcealed, outer margin irregular, apices truncated ; intervalvular sacs absent ; spermatheca 

 large, bladder-shaped, without a distinct neck. 



Type material. Holotype $, without data but with a label " Br/c " and other 

 type labels, Hope Dept., Univ. Mus. Oxford ; holotype $ of Leptocorisa nigricornis 

 Stal, Brazil : Minas, Riksmus. Stockholm. 



Other material. Brazil : 21 <$, 16 $ ; British Guiana : 1 $ ; Venezuela : 

 1 $ ; Mexico : 2 $, 2 $ ; Panama (Canal Zone) : 1 $ ; U.S.A., Florida : 1 $• 



