HETEROMERA, MALACODERMATA, ETC. 



!>3 



synonymous with S. livida F., and Fairmaire himself owned to some difficulty 

 in distinguishing his new species from small forms of S. livida ; unfortunately 

 this author does not appear to have observed the mandibles. I am indebted 

 to M. Pierre Lesne for kindly comparing a specimen from the Marquesas Is. 

 with the type in the Paris Museum. 



37. Pselaphanca lateritia Fairmaire (Text-fig. 9). 



Rev. Zool. (2), I, p. 457, pi. 11, fig. 5, 1849 (Selenopalpus lateritius) ; 

 Blair, Ann. and Mag. Nat. Hist. (9), xx, p. 165, 1927. 



Upolu : Malololelei, vii.1925, 1 $ (Wilder). 



The British Museum series is from Tahiti, Rara- 

 tonga, and Moorea, Society Is., Feb. 1913 (C. S. Betton). 

 This species was recently obtained in some numbers 

 at light on Tahiti, sea level to 2000 ft., hi., iv.1925, and Text-fig. 9.— Pselaphanca 

 Raiatea, sea level (C. L. Collenette and Miss E. L. Mentia Fairmaire ; max 

 Cheesman, St. George Expedition). lllary P al P us ' & 



38. Sessinia livida Fabricius. 



Syst. Ent., p. 14, 1775 (Lagria). 



Upolu : Apia, v.-ix.l924, 21 examples ; Aleipata, Lalomanu, xi.1924, 

 1 example ; Tafua Volcano, 2 examples (Swale). 



Tutuila : Pago Pago, ix.1924, 2 examples (Swezey and Wilder). 

 Ellice Is. : Funafuti and Nui, ix.1924. 

 Tonga : Nukualofa, ii.1925, 4 examples. 



This is a rather widely distributed Polynesian species, ranging westwards 

 to Fiji and the Ellice Is. ; type locality, Tahiti. In the specimens before me, 

 there seems to be considerable variation, both in size and in puncturation, but I 

 am unable to separate them specifically. 



The sexes, as in Ananca, are difficult to distinguish without dissection, but 

 the 5th ventral segment in the female is a little more pointed than in the male. 

 Further, in general appearance, the resemblance between these genera is very 

 close, but in Sessinia Pasc, of which this species is the genotype, the mandibles 

 are simple at the apex, with the tips overlapping when closed, and more 

 gradually curved along their outer side so as to project considerably beyond 



