1888.] INSECTS OF CHRISTMAS ISLAND. 551 



(very bright red beneath), and marked as in the male ; hiad tibite 

 black at the base on the inside and beneath ; the basal third other- 

 wise yellow, the middle third black, and the apical tbird red. Spines 

 white, tipped with black ; extreme tip of hind tibire, ineluding the 

 base of the terminal spines, and hind tarsi, yellow. Tegulee and 

 wings nearly as in the male ; but the tegulse, and especially most of 

 the longitudinal nervures, darker ; many of the cross aervules, a short 

 stripe before the middle above the principal nervure, and most of the 

 nervures on the inner marginal region are red. 



In both sexes the costa is moderately arched at one fourth of its 

 length. 



Not very closely related to any species previously represented in 

 the British Museum. 



Captured October 1. 



HYMENOPTERA. 



FORMICID^. 



Camponotus melichloros, sp. n. 



Long. Corp. 7-8 lin. 



Worker. Structure nearly of C. ligniperda. Thoracic sutures 

 fairly well defined ; node of petiole forming a rounded plate. Smooth 

 and shining, sparingly clothed with erect white hairs ; thorax honey- 

 yellow ; head and tarsi reddish ; flagellum paler ; abdomen black, 

 with pale sutures ; eyes and extreme tips of mandibles black, the 

 latter sexdeutate. 



The following label was attached to the bottle: — "Two forms from 

 same nest in rotten wood. Flying-Pish Cove, October 2." The 

 specimens differ little, except that some are rather smaller and paler 

 than others, and with conspicuously smaller head. 



P0NERID.E. 

 Lobopelta diminuta. 



Ponera diminuta, Smith, Cat. Hym. B.M. vi. p. 89. n. 23 (1850). 

 Pour workers from a nest ; found near the summit of Christmas 

 Island, October 4. Originally described from Sarawak. 



EUMENID^. 

 OdYNERUS POLYPHEMUS, Sp. U. 



Long. corp. 10 millim. ; exp. al. 17 millim. 



Black, thickly and closely punctured ; head with a yellow spot 

 between the antennae ; the orbits opposite the antennae very narrowly 

 edged with yellow ; a yellow streak on each side of the base of the 

 clypeus, just below the antennae, and a yellow streak behind each 

 eye, above the middle. Prothorax edged in front with a broad 

 yellow stripe, tapering and interrupted in the middle, and cut 

 squarely off on each side. Tegulae pitchy, with a very small yellow 

 dot in the middle, a triangular yellow spot above, and another, sub- 

 rotund, on the mesopleura. Scutellum with a broad longitudinal 



