12 Prof. Westwood on species of Ascalaphus. 
totally differing from the mandibles either of the larva 
or imago, and given to the pupa only for the purpose of 
biting its way out of the cocoon. 
The perfect insect (fig. 29) measures nearly an inch 
(11 lines) in length, and 23 in. in the expanse of its fore 
wings. It is of a fulvous colour; the thorax more yellow, 
with two darker discoidal spots; the scutellum is pale 
yellow; the antenne are fulvous, with black tips; the 
wings are hyaline and colourless, with a very pale 
yellow stigma (fig. 35). The mandibles of the imago 
(fig. 80) are conical, rather dilated, and toothed on the 
inner edge at the base, the tip bent and acute. The 
maxille (figs. 31, 32) are bilobed, the outer lobes slender 
and curved, with curved sete along the inner edge; the 
base of the inner lobe with a brush of long slender 
hairs; the maxillary palpi 5-jointed, the middle joint 
being the longest and subclavate. The labrum (fig. 32) is 
elongate-ovate, slightly bilobed at its anterior extremity ; 
the labial palpi slender, 4-jointed, the two basal joints 
short. The abdomen of the male (fig. 38, seen sideways) 
is long, with the four terminal joints slender, the pre- 
ceding segment with two fascicles of erect hairs; the 
apex of the body obtuse, without any exserted lobes; 
the terminal segment of the male is shown from above 
in fig. 34. 
