108 



INSECTS OF SAMOA. 



P. invalidus Bergr. is generically distinct from the American genus Pictinus 

 Stal., but this point cannot be decided without a revision of the group, which is, 

 of course, out of the question in the preparation of a faunistic paper of this nature. 

 Two males from Malololelei (Upolu) and Salailua (Savaii) respectively, differ 

 from the typical species in the relatively longer third antennal segment, slightly 

 larger size, and less acute anterior lateral angles of pronotum. Consequently 

 these specimens have not been regarded as paratypes. 



22. Ctenoneurus samoanus, sp. n. (Text-fig. 8). 

 Colour. — ^. Dark ferruginous brown, vertex of head, posterior margin of 

 pronotum, scutellum, corium, and clavus and a spot at the anterior lateral margin 



of each segment of connexivum (more or less 

 obscure on seventh and eighth segments), 

 brownish-black ; antennae, rostrum, con- 

 nexivum, apices of femora, tibiae and tarsi, 

 pale ferruginous brown ; membrane smoky 

 hyaline, with a large irregular obscure in- 

 fuscation in middle of its costal margin, and 

 the area just beyond the apex of corium paler. 



Structure. — Head slightly wider than long 

 (21 : 18), apical process (tylus) parallel sided, 

 scarcely reaching middle of first antennal 

 segment, its apex obtuse, slightly bifid ; anten- 

 niferous spines rectangular, very short, directed 

 laterally not extending anteriorly beyond 

 insertion of antennae ; postocular processes 

 obsolete ; rostrum extending slightly beyond 

 buccal groove, to anterior margin of pro- 

 sternum ; antenna much longer than head, 

 first segment incrassate nearly half as wide 

 as long, second segment short and thickened 

 apically, third longest, linear gradually thick- 

 ening towards apex, fourth fusiform its apex 

 pale ; relative length of segments 10:5:12:10. 

 Pronotum slightly longer than head, about twice as wide at base as long (45 : 22) 

 and about as wide as long anteriorly (22 : 22) ; anterior margin concave, the 



Text-pig. 8. — Ctenoneurus samoanus, 

 sp. n. : dorsal view (legs omitted). 



