

BT 
SIREX SP. 
Plate VII, fig. r, amf. 
Reference :—Provisionally determined as Sivex sp. 
Classification :—Order, HYMENOPTERA. Family Siricide or 
Uroceride. 
Tree attacked :—Picea Morinda (Spruce). 
Description. 
Larva.—A stout canary-yellow thick grub, about 1} inches 
in length and just under $rd inch breadth. Head small and 
yellow with brownish black mandibles, toothed on their upper 
edges giving them the appearance of molar teeth. The thoracic 
segments are enlarged, the anterior one almost forming a hood 
over the small head. These segments each bear on their under 
surfaces a pair of small projections representing the thoracic 
legs. There are no other legs behind these, but some slight 
protuberances take their place. Following these three segments 
are nine others, the terminal one of which is enlarged and ends 
in a brownish black spike bearing a few short spines upon it, 
On either side of each segment there is an elliptical brownish 
spiracle placed anteriorly. (See PI. VII, fig. 1, a.) 
Pupa. 9.—A pale yellow in colour, unenclosed in any 
covering and lies quite free at the end of the larval boring. All 
the parts of the future insect are developed but, with the excep- 
tion of the eyes, which are brown and elliptical, they are all of a 
uniform pallid colour in the initial stages. In the pupa being 
described the palpi, antenna, legs and wings (about one-third 
their future length) were all quite free and pressed close to 
the ventral side of the insect. The three parts of the ovipositor 
were present and separated, as also the augur terminating the 
last segment. Length to end of augur 1} inches. Ovipositor 
gths of an inch. The pupa described is a female. The male 
has of course no ovipositor. (See Pl. VII, fig. 1, b.) 
Imago. &.—A large handsome insect. General colouring a 
metallic blue-green and rich chestnut. Head and thorax very 
M 
