larva of Nycteribia. 361 
like the stigmatical openings in the middle of the body, 
on its dorsal side, as described by Mr. Humbert in the 
larva of Nycteribia. 4. Finally, it would appear, both 
from the sketches and the descriptions, that the develop- 
ment of the limbs of the future insect was further 
advanced in the larva of Nycteribia, at the moment of its 
parturition, than in the larva of Melophagus, at the 
corresponding stage of its existence. 
It would be unfair to push further the scrutiny of Mr. 
Humbert’s sketch, jotted down on the spot without pre- 
meditation, and to which he attached so little importance 
that it remained more than twenty years in his portfolio. 
Still there is enough prima facie evidence to show that 
the larvee of Nycteribia differ very materially from those 
of other Pupipara, and would repay further study. 
EXPLANATION oF PuateE XVI. 
Fies. a, 6. Adult larva of Nycteribia. Upper side. 
Fig. c. PA “4 = Natural size. 
ae as = 5 Upper side, showing 
stigmata. 
9 Gs 9 2 rs Transverse section. 
» J ” 9 Ay Under side. 
TRANS. ENT. Soc. 1881.—PART III. (SEPT.) 3B 
