18 Journal of the Asiatic Society of Bengal. {N.S., XIX, 
as 60 hours, during which, their normal activities of life, i.e. 
taking in of food, and general movements, are not suspended. 
They remain moving from place to place, the female serarally 
leading the way. 
ANATOMY—EXTERNAL. 
The body is covered all over with chitin which is thickened 
at certain places to form definite plates or sclerites 
The Head (Figs. 1, 2, 3b and 4b) is triangular, ‘its ventral 
surface is flat whilst the dorsal surface is depressed anteriorly. 
The great development of the ventral or gular region prevents 
the deflection of the head. The latter is deep red with the 
exception of the eyes and the antennae, which are black. 
The ventral lip or labium, is much longer eae =e dorsal lip 
or labrum and is ge enerally carried deflect the ventral 
surface, where there is a shallow groove je receive 2 it. Ocelli are 
absent 
Alt hough the different sclerites composing the head are too 
intimately fused, the following ies (beginning from the 
posterior ‘end) can be distinguis 
Occiput (OC. Fig. 3b) is the sallae: like region forming the 
boundary of the occiput foramen; during life it is scarcely 
visible one telescoped under the anterior region of the 
prothor 
Apioraniem (EP. Figs. 1, 3b) is a flat plate lying een = 
to the occiput and bears a pair of conspicuous black ey It 
as a median longitudinal furrow reaching the base ps the 
clypeus. Tower (27) applies the terms “Cranium” and 
‘“Frons” to the anterior and the posterior parts of the epi- 
cranium of the squash bug (Anasa tristis). But in D. cingulatus 
there is no suture or even an nen pi line to warrant the 
division of epicranium into two region 
Clypeus (ClY. Figs. I, 3b, 7a; 7b) ediiehi 4 is a broad plate in 
mandibulate insects, is comparatively long and narrow in D. 
cingulatus and forms the anterior median portion of the head. 
Laterally it is enclosed by the two fulcra (FR.). At its base 
where it is attached to the edge of the epicranium, the 
clypeus is flat and narrow, but anteriorly it depresses down and 
at the same time widens to form a base for the attachment of 
the labrum. Its dorsal surface has irregularly scattered fine 
setae which are probably sensory ; and the sides are sunk down 
into the head to form the clypeal folds (CIY. Figs. 8e, 8f). 
Fulcra or the two triangular pieces on the sides of the cly- 
peus (FR. Figs. 1 and 3b), are confluent at their base with the 
edge of the epicranium. They probably correspond to the 
frontal ridges of Muir and Kershaw (14). In the Potato capsid 
bug (Lygus pabulinus) Awati (1) makes no mention of fulera but 
terms the corresponding region maxilla sclerite (text-figure 17), 
and shows it to be the base of the mandibular protractors. 


