THE LEPTOCORISINAE OF THE WORLD 113 



This species can easily be separated from M. prolixa (Stal) by examining the median 

 posterior margin of pygophore in £, which is pointed in this species and concave in 

 prolixa. In $, the ninth paratergite is comparatively short and broad, breadth about 

 half of the length in this species, whereas in prolixa it is elongate and breadth is one- 

 third of length. 



Of the three specimens recorded by Dallas only two remain in the British Museum 

 Collection. One is a <J (Brit. Mus. 1844-4) collected by Surgeon J. Byrne, R.N. 

 during the voyage of H.M.S. Beagle in North West Australian waters and presented 

 to the British Museum by Haslar Naval Hospital in 1844. The other is a $ collected 

 on the Swan River, North West Australia and presented by Sir John Richardson to 

 the British Museum in 1843 (Brit. Mus. 1843-14). Both are labelled New Holland. 



The (J syntype is here selected as lectotype of this species and has been given a 

 blue museum lectotype label and labelled lectotype of Leptocorisa brevicornis Dallas. 



Mutusca prolixa (Stal) 

 (Text-figs. 304-37 2 ) 



Leptocorisa prolixa Stal, 1859 : 235 

 Mutusca prolixa (Stal) Stal, 1873 : 86 



Characterized by thin and straight paraclypeae, by long basal antennal segments, 

 which are about a third longer than third segment and by the form of $ and $ 

 genitalia. 



o*. Body length, 14 -5-16-0 mm., width, 1-4-1-6 mm. Head length, 1-9-2-2 mm., (only 

 paraclypeae 0-8-0-9 mm.), width, 1-2-1-3 mm. Antennae, segment I, 3-4-3-7 mm., II, 2-4- 

 2-8 mm., Ill, 2-3-2-7 mm., IV, 2-5-2-7 mm. Rostrum, segment I, 1 -i-i z mm., II, 1 -i-i -2 mm., 

 Ill, 0-5-0-6 mm., IV, 0-7-0-8 mm. Pronotum, length, 2-3-2-6 mm., width, 1-4-1-6 mm. Hind 

 femora, 4-7-5-2 mm. Hind tibia, 5-2-5-3 mm. Distance between ocelli, 0-4-0-43 mm., 

 distance between an ocellus and an eye, 0-55-0-66 mm. 



Body linear, usually pale, tinged light brown. Head with paraclypeae uniformly thin, 

 straight and diverging at apices (Text-fig. 3). Antennae, usually tinged with pink, with long 

 basal segment, at least a third as long again as third segment ; second at least slightly longer 

 than third. Rostrum usually reaching anterior margin of second coxae. Pronotal disc usually 

 without brownish black spots on posterior angles. Legs pale, with femora tinged light green. 

 Hemielytra with red subcostal and radial veins. Abdomen, with dorsum brownish black, 

 venter pale with a black median longitudinal line. Posterior margin of seventh abdominal 

 tergum with a median rounded projection, projection densely punctate ; pygophore rounded 

 with median posterior margin concave (Text-fig. 364). 



<$ genitalia : Claspers comparatively with a short neck and greatly developed median 

 process (Text-fig. 365) ; both (dorsal and ventral) pairs of thecal appendages present ; second 

 left lateral conjunctival appendage, represented by scattered spines, first lateral asymmetrical ; 

 membranous appendage with a large terminal appendage (Text-fig. 366) and a pair of dorso- 

 lateral membranous appendages. 



$. Body length, 17-0-18-1 mm., width, 1-6-1-7 mm - Head length, 2-0-2-2 mm., (only 

 paraclypeae 0-7-0-9 mm.), width, 1-3-1-33 mm. Antennae, segment I, 3-4-4-0 mm., II, 

 2-4-2-8 mm., Ill, 2-3-2-7 mm., IV, 2-5-2-7 mm. Rostrum, segment I, 1-2-1-3 mm., II, 1-2- 

 1-4 mm., Ill, 0-5-0-55 mm., IV, 0-7-0-8 mm. Pronotum, length, 2-5-2-9 mm., width, i-6- 

 1-7 mm. Hind femora, 4-6-5-6 mm. Hind tibia, 4-9-6-0 mm. Distance between ocelli, 

 0-4-0-43 mm., distance between an ocellus and an eye, o-6— o-66 mm. 



Very similar to $ in general appearance but usually longer, posterior margin of seventh 



