Part III.] Beeson: Beehole Borer of Teak. 
31 
Spiracles (s) on segment 1 concealed, on segment 2 half-concealed by 
hindwing, on segments 3—7 oval, margins raised, on segment 8 rudi¬ 
mentary. Proleg scars (psc) visible on segments 4—6. Setae (st) where 
present, correspond in position and number to the larval setae. 
External Genitalia (go); FEMALE. Boundaries between segments 
10 and 9, and between 9 and 8, prolonged forwards into the 
zone of the 8th segment, and closely approximated at the apices. (The 
sutures are not distinct in the region of the external genitalia, and are 
lost in the generally wrinkled surface, so that the segmental relations of 
the anterior and posterior generative openings are doubtful. In nearly 
all specimens examined the bursa copulatrix and the opening of the 
oviducts are not separable, but in a few individuals the relative posi¬ 
tion of each is distinguishable). Together the external reproductive 
organs appear as a median slit close to the apex of the 10th segment (go) 
which passes over into a longitudinal ridge flanked by two divergent 
carinulae; from the bursa copulatrix a fine median carina (ae) extends 
cephalad beyond the 8th segment to the caudal margin of the 7th, 
where it terminates in the transverse depression continuous with the 
dorsal flanged plate; this anterior extension may be straight, *but is 
often sinuous or forked or smoothly interrupted. Viewed from inside 
the main opening of the bursa copulatrix appears as a laterally com¬ 
pressed funnel-shaped invagination. MALE. Boundaries of segments 10, 
9 and 8 distinct and transverse ; genital opening (go) on caudal margin 
of segment 9, consisting of a pair of raised trianguloid or sub-quadrate 
plates, meeting mesally in a longitudinal furrow; immediately anterior 
to the genital opening is a rugose or wrinkled area, which appears to be 
without morphological significance. Cremaster (cr) represented by a 
highly chitinised rugose area on the ventral surface of segment 10, with 
10 large conical teeth and a few smaller ones, the points directed back¬ 
wards. Anal opening (ao) longitudinal, margins striate. 
Length. —FEMALE 96 mm. to 53 mm.; average (of 20) 68 mm.= 
2*72 inches. MALE 76 mm. to 45 mm. ; average (of 32) 54 mm.= 
2*16 inches. 
The above measurements were made mostly from pupal skins which 
are on the whole longer than the pupae. Beekman [1919, p. 8] gives 
7 cm. as the measurement of the pupa. 
Duomitus ceramicus agrees generally in its pupal characters with 
those given by Mosher, for the Cossidae, in the following details:— 
“ Abdominal segments 3—6 moveable in female and 3—7 in the 
male 55 [Mosher, 1916, p. 39]. There is, however, in ceramicus distinct 
movement between segments 2 and 3 and highly probable movement 
between segments 1 and 2 in both sexes. 
[ 259 ] 
