60 I. AHMAD 



Other material. Congo : 10 <$, g $ ; Ghana : 2 <$, 1 $ ; Tanganyika : 10 <3\ 



12 $. 



The range of this species extends in the west into Ghana and in the east into 

 Tanganyika, but this seems to be more common in eastern Africa. Adults have been 

 collected mainly in April and May. 



This species is isolated in the subgenus Stenocoris s. str. by the characters of long 

 rostrum, which approaches third coxae, greatly reduced frontal conjunctival append- 

 ages in the aedeagus and by tubular spermatheca. 



STENOCORIS (ORYZOCORIS) subgen. n. 



Leptocorisa Latreille 1829 ; Laporte, 1833 : 25 ; Stal, 1873 : 87 

 Leptocorixa Laporte ; Hussey, 195 1 : 152 



Type-species : Cimex filiformis Fabricius by monotypy. 



Body linear. Head elongated, almost half as long again as broad ; paraclypeae short, 

 straight and rounded at apices ; ocelli wide apart, interocellar distance only slightly shorter 

 than distance between an ocellus and an eye (in both cases including the diameter of both). 

 Antennae with apical segment pale only at base, second subequal to third. Rostrum very short, 

 hardly approaching second coxae. Lateral black line usually entirely absent, sides of head and 

 thorax pale. Pronotum fiat with latero-posterior tips usually pale but sometimes brownish 

 black. Abdomen dorsally yellowish red, abdomen ventrally usually pale unicoloured. 



In o\ posterior margin of seventh abdominal tergum truncated ; pygophore elongated, 

 laterally posterior tips acutely pointed ; claspers asymmetrically crossed over pygophore, 

 curved in the middle and strongly pointed at apices ; aedeagus with only ventral pair of thecal 

 appendages, dorsal pair wanting ; frontal conjunctival appendages paired, very small ; mem- 

 branous appendage rounded with paired dorsal appendages, terminal appendage absent. In 

 $, posterior margin of seventh abdominal sternum with short median split ; first gonocoxae 

 small, almost truncated at apices ; intervalvular sacs absent ; spermatheca very large oval, 

 with a short coiled tube of varying thicknesses. 



This subgenus can be separated from other subgenera, in the <$ by the claspers 

 which, at rest, are always crossed over the pygophore and are not in a socket (Text-fig. 

 178) and in the $ by the posterior margin of seventh abdominal sternum, which is 

 always with a short median split (Text-fig. 181). 



Laporte described Leptocorisa and included linearis (Nearctic and Neotropical) ( = 

 filiformis Fabricius) but in 1830 Guerin had already described his flavida (Oriental) 

 ( = acuta Thunberg syn. n.) under Leptocorisa Latreille. This was the first redescrip- 

 tion of Leptocorisa Latreille, 1829 and flavida, the first and only species ever included 

 in the genus, became the type-species of Leptocorisa Latreille by monotypy. Stal 

 divided Leptocorisa into four subgenera as follows : (1) Rhabdocoris Kolenati, 1845 ; 

 (2) Stenocoris Burmeister, 1839 ; (3) Erbula Stal, 1873 ; (4) Leptocorisa Laporte s. 

 str. During the present study Rhabdocoris Kolenati (type-species arcuata Kolenati, 

 1845) has been synonymized with Leptocorisa Latreille and all the Oriento-Australian 

 species (previously described under subgenus Rhabdocoris) have been separated from 

 other Ethiopian, Nearctic and Neotropical species. Stenocoris being the senior 

 subgenus has been given generic rank and Leptocorisa Laporte (a hitherto undes- 

 cribed subgenus) has been described here as Oryzocoris. 



