AUSTEALIAN HTMENOPTEEA ACULEATA. 325 



wiugs ; scapulge black ; meso- and metathorax black, the latter 

 with three small spines at the lower angles. Abdomen black, 

 the first segment narrowly, and all the others rather broadly, 

 edged with orange above, and, except the first, narrowly below ; 

 the subterminal segment is more broadly bordered with orange 

 beneath ; and the terminal segment is entirely orange above, ex- 

 cept at the base, and black, with a narrow yellowish rim, below; 

 the orange border of the second segment projects forward on 

 each side above, but the other borders are not perceptibly waved. 

 Eront legs reddish ; femora black at the base, and with a yellow 

 stripe at the tip beneath ; four hind legs red, the greater part of 

 the femora, the tips of the hind tibise, and the basal joints of all 

 the tarsi black above. "Wings yellowish hyaline, smoky towards 

 the extremity ; subcostal nervure blackish, especially at the 

 base. 



Male. The light markings of a much deeper colour, of an 

 orange-yellow ; clypeus (which is semicircularly emarginate at 

 tip), labrum, and mandibles (except the tips, which are blackish) 

 orange-yellow ; upper part of the head almost entirely black ; 

 an orange-yellow mark, like a dumbbell, between the antennae ; 

 orbits, from the clypeus to the depth of the emargination, nar- 

 rowly reddish ; cheeks behind the eyes entirely reddish on their 

 lower portion, but this colour rapidly narrows, and ceases en- 

 tirely at two thirds of the height of the hinder orbits. Prothorax 

 and legs almost entirely reddish orange, the four hinder coxae 

 only being slightly marked with blackish ; on the sides of the 

 prothorax are two reddish spots and a streak, the uppermost and 

 smallest of the spots being in front of the base of the fore wings. 



Fig. 4. 



a-c. Outlines, nests of Ehynchium Eothi, of natural size, and showing 

 the irregularities in shape of nests made by the individual insect. 



