THE PLUMB-MOTHS OF CEYLON. 



155 



previously pointed out, the Orneodidse have no real relationship, 

 although both group's are popularly included under the same 

 trivial name of " Plume-moths." 



The pupa of 0. hexadactyla is brown , and resembles in its external 

 appearance the pupse of the true Noctuids, Pyralids, and Tineids ; 

 it is short and squat, and (without regard to minute single hairs, 

 only visible under high magnification) is smooth and glossy. In this 

 respect alone it is strikingly different from the Pterophorid pupa. 



" The head -plate (Cephalotheca) is strikingly large (as in many 

 Pyralids and Tineids, whilst in the Pterophorids it is very small). 

 On the lower side of the head -plate upper groove (' Oberlippe ') and 

 upper jaw (' Oberkiefer ') are clearly marked, the labial palpi on the 

 contrary only small and indistinct between the roots of the long 

 maxillae ; no traces of maxillary palpi are present. The very slender 

 prothorax, as well as the mesothorax and metathorax, correspond 

 in their proportions to those of the imago. 



Figure 3. 



Pupa of Omeodes hexadactyla (after Chapman). 



" The forewing-covers are broad with stumpy tips forming almost 

 a right angle, and reach as far as the posterior margin of the fifth 

 abdominal segment ; they are free at their outermost extremity ; 

 through the covers are clearly seen the six segments of the wing as 

 so many dark streaks, segments 1 and 2 connected at their bases, 

 as are also 3, 4, and 5, but 6 quite free. 



" The hindwings are long and slender, and first disappear under 

 the forewing-covers at the posterior margin of the fourth abdominal 

 segment. 



"The antenna-sheaths are as long as the forewing-covers ; the 

 sheaths of the first and second pairs of legs on the contrary are 

 shorter; of the first, the sheaths of the trochanters and femora 

 (' Hiiften ') occupy a comparatively broad space between the 

 maxillse and second pair of legs. The third pair of legs lies under 

 the second, and projects freely a little above the wings up to the 

 posterior margin of the sixth abdominal segment. 



