( clxv ) 



error above referred to. Although erycina is only definitely 

 known from the Sarayacu district, while the only known 

 examples of pelopia are from "interior of Colombia" and 

 Chanchamayo (E. Peru), one cannot doubt that they will 

 prove to occupy the same ground and to share in some mimetic 

 association. 



Also several new or doubtful forms of Castnia, not yet 

 fully worked out. 



Further Observations on the " Cuckoo-spit " Insect. — 

 The President stated that since the meeting on June 5th, 

 when he gave a short account of his observations on the 

 " cuckoo-spit "' insect, he found that an elaborate and very 

 interesting paper on the same subject had been published by 

 Dr. Karel Sulc in November 1911. It was some satisfaction 

 to him to know that while his own main observations turned 

 out not to be new, they were almost in complete accord with 

 those of the Bohemian entomologist. There was one fact, 

 however, frequently observed by himself which seemed to 

 have escaped the observation of Dr. Sulc and other writers 

 on the subject. According to them, the liquid excreted from 

 the anus accumulates beneath the body of the insect ; and 

 into this liquid the tip of the abdomen is dipped, and then 

 the bubbles of froth are blown. But when the insect has 

 moved away into a new 7 position, bubbles are generally pro- 

 duced before there is sufficient liquid under the insect in which 

 to dip the end of its body. What he saw happen on such 

 occasions was this : the insect at first stretches out its 

 abdomen, directing it obliquely upwards, and the lips of the 

 valve which admits air to the ventral air-chamber are at this 

 time kept open ; this condition lasts awhile, and then the 

 liquid coming from the anus forms a film across the open 

 valve, the abdomen is now dipped downwards and a little 

 to one side, and at the same time the lips of the valve gradually 

 close, and the bubble, which during the process has been 

 forming, is set five; the ti|> of the abdomen is again raised, 

 and then dipped down towards the other side. In this way 

 the bubbles are formed and deposited alternately right and 

 left of the insect, and gradually are pressed forwards along 

 each side. He believed that it was the mere pressure exerted 



