1910.J 61 



liow the eyes giiidingly watch the inovements of the teriiiiual segment 

 which, when actively spinning, lies close to the organs of vision. The 

 pupa also rests curved in the cocoon. In from 14 days to three weeks 

 after pupation the imagos emerge. When the pupa has worked its 

 way out of the wide-meshed cocoon, and by this time has stretched 

 itseK out perfectly straight, it always rmis some distance (35 cm. 

 being the longest stretch hitherto observed) until it has found a suit- 

 able spot where it is able to fix itself firmly by the claws. Only then 

 does the perfect insect burst the integument of the back of the pupa. 

 The height of the flight time happens in July and August, and 

 during these months I have sometimes found paired couples. In the 

 first days of October I have observed the last examples of the year in 

 the open near Zurich. I have never seen the species in winter or 

 in spring. The eggs therefore are surely deposited in high summer 

 and autumn, and probably in large batches — the fact that the larvae 

 usually occur in numbers, close together, leading to this conclusion. 

 Whether the eggs over- winter or the larvae emerge before winter, has 

 hitherto escaped my observation." 



In addition to these Notes, Professor Standfuss has also most 

 kindly sent a series of the extremely neat cocoon (including one in 

 situ) and two pupal skins, thus providing material which could not 

 have been olitaiued otherwise for the relative figures. He and Dr. Kis 

 have further forwarded for examination a rather long series of the 

 perfect insect. These, in conjimction with my own few specimens, show 

 some range in the colour of the fore-wings, the darkening being no 

 doubt to a considerable extent a matter of age. In one or two there 

 is also a reduction in the intensity of the brown markings, including 

 the streak which runs to the wing-tip. The dates of these Swiss 

 specimens include April, May, June, July, September and October. 

 Standfuss has a specimen from the Riesengebirge in September. 



This paper owes its origin entirely to the co-operation of Mr. 

 Rothschild. In addition to providing the drawings and the plate, he 

 has laid me under special obligation by sending me for perusal Von 

 Grleichen's rare and interesting memoir. I should also like to thank 

 Dr. Ris for his invaluable assistance in various ways, including a loan 

 of several important papers. 



P.S. — Commander Walker has just informed me that there are 

 four British specimens of D. plialeenoides in the Oxford University 

 Museum, viz. : two in the Hope-Westwood Collection of Netiroptera, 

 and two in the Dale Collection. He writes : "Of the first named, one 



