64 P. CAMERON. HYMENOPTERA I. 



and sparsely punctured. Front and vertex closely and strongly punctured. Thèse is an obscure 

 transverse spot above the antennae and one opposite them at the eyes. Apex of pronotum 

 transverse, margined, the margin testaceous in front. Scutellum large; the post-scutellum with 

 an abrupt steep slope. Metanotum almost transverse, very slightly hollowed in the middle, 

 the latéral angles rounded, narrow above, more broadly rounded below, where they project 

 broadly. First abdominal segment without a suture; the second bell-shaped, in length clearly 

 longer than its width at the apex; both are closely and distinctly punctured. The insect, 

 ail over, is covered with a dense white pile. The fîagellum of the antennae is brownish below 

 towards the apex. 



This black insect cannot well be confounded with any of the recorded Malay species 

 of Odynerus. 



Eumenes Latr. 



1. Eumenes xanthura Saussure. 



There are 2 examples from Humboldt Bay which are probably referrable to E. xanthura. 

 As they do not agrée with the descriptions of Saussure, (Vespides, I, 46, pi. 10, f. 4) or Bingham 

 (Fauna of India, Hymen. I, p. 341) I give a description of them. 



Ç Black, the antennae, labrum, clypeus, a line from the middle of the lower half of 

 the eye incision, a large mark above the antennae, curved roundly and bilobate above, a 

 narrow line behind the eyes in the middle, labrum and the mandibles broadly in the middle, 

 yellowish-testaceous; a large line on the base of the pronotum, a small one below the tegulae 

 a mark in the centre of the abdominal pétiole, which may hâve its middle entirely or the 

 apical half only black, a large rounded mark, narrowed at the sides, on the apex of the 2^ 

 segment and the others entirely, orange-red. Legs rufo-testaceous, the tarsi paler, more yello- 

 wish ; ail the coxae and broad lines on the underside of the femora black. Wings yellowish- 

 hyaline, suffused with fuscous. 



As with most of the species the colouration varies no doubt considerably. In this 

 respect the 2 spécimens in the collection are not identical. One of them has the hind tibiae 

 broadly black. 



2. Eumenes tricolor sp. nov. 



Humboldt Bay, Tune. 

 Black, clypeus, labrum, a spot, longer than wide and dilated above over the antennae, 

 the eye incision except narrovvly above, prothorax, scutellum except at the apex, post-scutellum 

 except narrowly at the base, the sides of the médian segment at the apex broadly, 2 large 

 spots on the base of the mesopleurae, almost united and of almost equal size;. the upper is 

 narrowed and rounded above; the base straight and slightly oblique, the apex rounded; the 

 lower is more oblique, much narrowed and rounded below, where it is not half the width it 

 is above, an interrupted line on the apex of the i 5t abdominal segment, 2 large spots on the 

 sides of the 2 aà - abdominal segment; its apical fourth ; the apical third of the 3>' d and 4A and 

 almost the whole of the 5 A and 6*, yellow; the mandibles, the ist abdominal segment from 

 close to the base to shortly beyond the middle and the 2nd segment broadly below at the 



