160 ON THE LIFE-HISTOEY OF CROCE FILIPENNIS. 



The author was able to observe the actual formation of the cocoon, and states that the 

 larva exudes the silk from the hinder extremity of the body. A retractile straight 

 needle-like process is thrown out and taken in alternately, which applies the silk to the 

 particles of sand. A brief description and figures of the larva are given, but no account 

 of the pupa. I am indebted to Mr. T. Bainbrigge Fletcher, of the Agricultural 

 Research Institute, Pusa, for bringing this note to my knowledge. 



7. EXPLANATION OP PLATE 32 



Fig. 1. The newly-hatched larva of Croce fiUpennis (much enlarged). 



Fig. 2. The full-grown larva (much enlarged). 



Fig. 3. Outline figure of the egg, with a millimetre on the same scale of magnification. 



Fig. 4. Figure of the ventral aspect of the head of the newly hatched larva, showing the mouth-parts. 



The maxillre have been partially separated from the groove they occupy beneath the mandibles. 



mcL, mandible ; mx., maxilla ; l.p., labial palp. Camera lucida drawing, Leitz obj. 3, 



oc. 4 — x 105. [The antennae have been omitted from the figure.] 

 Fig. 5. Cuticular spines from a young larva, a, dentate spine; b, lanceolate spine. Leitz obj. 6, 



oc. 4— X 460. 

 Fig. G. A cocoon opened to show the internal lining of silk. The cocoon is constructed of waste 



particles and sweepings from the floor of an empty room. (Enlarged.) 

 Fig. 7. The pupa viewed from the ventral aspect, p.m., provisional mandibles ; mx., maxilla ; mx.p., 



maxillary palp. (Enlarged.) 

 Fig. 8. The pupa viewed from the right side (enlarged). 



