No. 5.] Description of a new Pear-tree Aphis from Ceylon. 276 



Wings smoky with cubital vein twice forked. Sligma lengthened. Ab- 

 domen obscurely dotted wilh black. 



This insect gives a fine crimson stain to Canada balsum and other resins- 

 Size of body 4-0 millemetres. Expanse 12-5 millemetres. 



Note, — The above descriptions and measurements were made from exam- 

 ples that had become partly shrivelled in alcohol. I find that dimensions of 

 the living insect are sliglitly greater. The body, in both the apterous and 

 winged female adult, measures from 4-50 to 5-0 mm. The expanded wings 

 in a well developed example, cover nearly 16*0 mm. 



Examples of the winged females collected in June (fig. d) seem to be 

 more brightly coloured than those of the March brood. 



The bases of both wings are thickly clouded with black : there is a small 

 yellow patch at the base of the costa on the fore-wing; and the elongate 

 stigma is almost jet black. 



Mr. Buckton does not appear to have described the apterous adult. It 

 differs from the larva chiefly in size, the length of the body being about 

 4-50 mm. The abdomen is swollen and smoothly rounded, showing no seg- 

 mental divisions ; though the position and number of the segments is plainly 

 indicated by the series of large round black spots (fig. e). The cornicles 

 are abruptly truncate, with a not very prominent median papilla. Antennae 

 with six joints; the first and second shortest; the third very long; the fourth 

 to sixth sub-equal, together scarcely exceeding the third. 



fig. a. Half-grown larva ") drawings from shrivelled specimens 



„ b. Winged female, March brood) by Mr. G: B. Buckton. 



„ c. antenna, 



„ d. Winged female, June brood ) drawn from living specimens by 



5, e. Apterous adult, „ „ \ Mr. E. Ernest Gieen. 



{fig, e is drawn to a larger scale \hz.nfig. d). 



