52 



KATYDIDS (TETTIGONIIDAE) OF SARAWAK MUSEUM. 



Macroxiphus varipes n. sp. 



9 . Eeddish brown. Scrobes of antennae unicolorous, 

 second segment only a little darker at base. Head as in 

 pictipes. Hind margin of pronotum not black. Basal part of 

 tegmina near fore margin slightly greenish, the remainder 

 yellowish "brown with dark spots in the same manner as in 

 pictipes. Sides of meso- and metathorax (above the insertion 

 of legs) blackish ; breast concolorous with the body, not 



Fig. 8. 9 subgenital plate of Marcoxiphus jyictipes (left) and M. 

 varipes (right). Enlarged. 



black. Legs spined and coloured as in pictipes, middle and 

 hind knees black. Subgenital plate ( 9 ) less narrowed towards 

 the apex than in pictipes, at the end more broadly excised. 

 Ovipositor not overreaching the end of tegmina. 



Measurements : Length of body 35 mm. of pronotum 9.5 

 mm. of tegmina 53 mm. of hind femora 27.5 mm. of ovipositor 

 33 mm. 



1 9 from Kalabit Country, Tamabo. 



This new species belongs to the pictipes-megaptenis-group, 

 having the fore femora spined on both edges. Griffini (1908) 

 stated that M. pictipes and M. megapterus are identical, 

 and I am, following him in "Genera Insectorum" (1912). 

 Eecently Hebard says that he also concurs with this opinion 

 (1922). In every case, these two species are very closely 

 related to each other, but according to the original descriptions 

 they differ in the shape of 9 subgenital plate which is in 

 M. megapterus (according to Brongniart) "apice truncate 

 haud excisa," in pictipes "attenuata, apice triangulariter 

 excise" (Dohrn). The cf oi M. megapterus was unknown to 

 Brongniart, but Hebard described the cf genitaHa : Dohrn, 

 however, stated for the male cerci, "apice bifidi, subtus 

 in medio dente brevi acuto instructi." There appears to 



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