DE1LEPHILA GALII. 37 



To Mr. Nicholas Cooke and Mr. Henry Terry my 

 warmest thanks are due for this great kindness, of 

 which 1 availed myself so far as to take fifteen figures 

 and to put together the following observations. 



The larvse reached me at intervals from the 6th to 

 the 26th of September, 1870, and fed freely on the 

 flowers, unripe seeds, and leaves of Galium verum, 

 and occasionally ate a little Fuchsia. When full-fed 

 they were restless, and wandered about for a day or 

 two before they settled down to spin. They made 

 for their covering a rather coarse network of threads, 

 which bound the sand beneath them with the Galium 

 above into a slight cocoon, and they had all retired by 

 the 8th of October. 



In form these larvse reminded me of some of the 

 Ohoerocampce ; for, although the thoracic segments are 

 but slightly retractile, yet they are tapered off rapidly 

 to the head, which is rounded and smaller than the 

 second segment ; the rest of the body is tolerably 

 cylindrical, just a little thickest in the middle seg- 

 ments and rather less bulky behind, the anal prolegs 

 being broad and squarely developed ; the caudal horn 

 is curved backwards, its point arching over the anal 

 flap, and it is rough, with minute bristly points. 



Each segment of the body, excepting the thoracic 

 and posterior segments, has a very broad subdivision 

 in front on the back, followed by six narrow ones, 

 though whilst the larva is very young the two hinder 

 folds are united into a broader one, the last wrinkle 

 being smoothed out ; these wrinkles or folds extend as 

 low as the spiracles. Just in the spiracular region there 

 is a longitudinal, somewhat puckered inflation, but 

 marked only by dimples when the creature is in repose. 

 A few very short bristly hairs fringe the prolegs. 



With regard to colour, I propose to describe the 

 changes that occurred in the smallest of six young 

 larvse up to its adult state, before speaking of 

 varieties. 



This larva, then, on its arrival, was about three- 



