156 



THE CANADIAN ENTOMOLOGIST. 



the Indian genus Orudiza, Walk. The larvre are remarkable. They 

 possess the five normal pairs of abdominal feet, with rather few crotchets 

 on the inner three-fourths of the planta, double hooked, of two not very 

 regular lengths. The setai are distinct but short, with large tubercles, 

 single except that vi. consists of two set?e, arising from separate tubercles 

 on abdominal segment 3 and posteriorly, but from the same tubercle on 

 segments i and 2. Tubercles iv. and v. are separate on the posterior 

 segments, strictly in line, iv. not at all higher. On abdominal segments 

 I to 3 they are united together. There is a distinct leg plate with scattered 

 setse. On the thorax i.a + i. b, ii.a + ii.b, iii. separate, iv. + v., vi. double. 

 The prothoracic shield is broken up, the lateral piece the most distinct and 

 bearing three set^e. The head has single set?e, fairly distinct. Those on 

 the epicraneum are 



normal above ; i., ii. 

 and iii. forming a 

 right angle ; iv. be- 

 low ; v., vi. and vii. 



Ant, 



(^ 





/ 



behind the eyes ; vii. 



situated between the 



two lower ocelli; viii. 



above the level of the 



eyes, midway b e - 



tween them and the 



clypeus ; ix. half way 



between viii. and the base of the antenna. (See Journ. N. Y. Ent. Soc, 



IV., 93, for numbering of head setse.) I adjoin a figure showing the head 



and abdominal setae of Callidapteryx in diagrammatic form. (Fig. 16.) 



The interpretation of these structures is at first puzzling. There is a 

 strange mixture of Bombycid and Tineid characters. Tubercle iv. is in 

 its generalized position, yet on the forward segments it unites with v. as 

 in the Tineids. But the fact that this union is not present throughout 

 shows that it is a recent acquirement, for when such a character is con- 

 genital it is present on all the segments without equivocation. Another 

 Tineid character is the union of the upper thoracic tubercles in pairs, 

 especially of ii. b with ii, a. Again, on the head seta viii. is high up as in 

 Tineids. 



The Bombycid characters are the leg plates, the half row of crotchets 

 on the feet, the doubling of tubercle vi. and breaking up of the cervical 



