Part III. - ] 
Beeson: Beehole Borer of Teak. 
4. THE PUPA, 
29 
[Plates ii, iii]. 
Technical description.* Form elongate, cylindrical, heavily 
chitinised, smooth, shining, appendages fixed [vide Plate ii, figs. 1—6], 
Colour yellow and fight brown when immature, chestnut brown with 
the thickened portions (frontal process, facial spines, toothed flanges, 
spiracles, cremaster, etc.), black when mature [vide Plate iii, fig. 3]. 
HEAD.’—Epicranial suture (es) distinct, transverse, completely 
separating head from prothorax. Front produced, in its anterior area, 
into a massive frontal process (fp) which rises abruptly in the facial 
(mesal) plane from between the eyes; ventrally the process terminates 
against the fronto-clypeal suture in a sharp transverse triangular tooth 
directed downwards, and slightly excavate in front; it then continues 
cephalad in a narrow impressed transversely striate strip with raised 
sub-parallel margins, until it culminates abruptly in an acuminate tip 
directed downwards and forwards; laterally the process is coarsely 
rugose, with a deep constriction at the level of the vertex, beyond which 
it swells out to the anterior margins ; anteriorly, i.e. } in the dorsoventral 
plane, the process is obliquely truncate, and longitudinally incised from 
the acuminate tip, the cleft deepening backwards to the vertex; the 
incision is bifid for a short distance anteriorly and the lateral lobes 
produced by it are also longitudinally furrowed ; the relative dimensions 
of the frontal process are shown in [Plate ii, figs. 3 and 4]. 
Genae indistinct. Clypeus, (cl) the anterior boundary is probably 
represented by the transverse tooth at the base of the frontal process ; 
the lateral margins are marked within by invaginations of the chitin. 
Labrum (lb) distinctly margined laterally and distally, but not separ¬ 
able from clypeus. Mandibles (md) small, raised, minutely tuberculate 
bosses at caudo-lateral angles of labrum. Eyepieces , glazed eyepiece 
(ge) and sculptured eyepiece (se) together forming a large prominent 
convexity, smooth, shining, slightly radially wrinkled along inner lateral 
edge near frontal process; sculptured eyepiece depressed in a rugose 
triangular extension between the antennal and 1st leg; (at dehiscence 
the eyepiece separates along a curved suture, the glazed eyepiece remain¬ 
ing attached to the facepiece and the sculptured eyepiece remaining as 
an isolated sclerite attached to the prothorax). Antennae (a) trans¬ 
versely ribbed, broad and elevated at base, narrowing gradually in $ 
and more abruptly in £, extending nearly as far caudad as 1st legs. 
Labial palpi (lp) semi-hastate with, in the middle, a sharp triangular 
* Terminology according to Mosher, 1916. 
[ 257 ^] 
