NOTES AND OBSERVATIONS. 241 



beneath. Head densely covered with silvery pubescence, thickest on 

 the front and clypeus. Eyes long, slightly converging above ; the 

 ocelli are in a curve ; the hinder are separated from each other by a 

 slightly greater distance than they are from the eyes. Clypeus at the 

 apex transverse in the middle ; the labrum large, the palpi black. 

 Thorax densely pruinose ; the apical slope of the median segment is 

 densely covered with woolly hair, silvery white in colour. Legs 

 densely pruinose ; the tibial and tarsal spines long and black ; the 

 calcaria white ; the longer of the hinder pair is two-thirds of the 

 length of the metatarsus. Wings hyaline ; the apex of both wings 

 infuscated ; the radial cellule short, wide ; the third cubital cellule is 

 petiolated ; below it is as long as the second ; the first transverse 

 cubital nervure is broadly and roundly curved ; the first recurrent 

 nervure is received close to the transverse cubital ; the second shortly 

 beyond the middle of the cellule ; the accessory nervure in the hind 

 wing is received behind the cubital. Abdomen sessile ; the basal seg- 

 ments densely covered with silvery pubescence ; the apical segment 

 bluntly pointed. 



(To be continued.) 



NOTES AND OBSEEVATIONS. 



Are Cocoons Waterproof ? — The question is suggested by my 

 experience of the disastrous rain-storm at Ipswich on July 1st. I 

 had a chrysalis of Odonestis potatoria in the cocoon on a stem in a tall 

 glass jar, which stood in a sheltered position near a wall. To my 

 surprise next morning I found the jar was filled with water to the 

 depth of five inches (a fact which indicates the greatness of the deluge), 

 and I concluded the chrysalis was drowned, and threw it aside. Two 

 days later, when it was dry, curiosity caused me to open the cocoon, 

 and I found the pupa alive and kicking I Considering that it must 

 have been nearly twenty hours under water, I thought the incident 

 worthy of record, and should be interested to hear of similar experiences. 

 Claude A. Pyett ; 28, Waterloo Road, Ipswich. 



Ichneumon in Zyg^na trifolii. — In July, 1901 (when in search of 

 Aporia cratoRgi), I came across a fresh locality for Z. trifolii, and the 

 examples appeared to be of a more blotched character than those I 

 usually get. This year I went to the spot in June in order to collect 

 a number of cocoons, and to my surprise I found that there were two 

 distinct sizes, one about one-third the size of the other. In about a 

 couple of hours I collected 400 cocoons, and after I reached home I 

 separated the two sizes, and found there were 275 small ones and 125 

 large ones. Several small larvae (typical trifolii) spun up while in my 

 possession, and were amongst the 275. I thought there must be two 

 species, and anxiously waited for their emergence. Alas 1 I was dis- 

 appointed, for the large cocoons produced very normal Z. trifolii, and 

 the smaller ones were all ichneumoned, with three exceptions, which 

 produced very dwarfed trifolii. The percentage of ichneumoned cocoons 

 (68-75 per cent.) seems exceptionally great, for in another place I 



ENTOM. — SEPTEMBER, 1902. U 



