278 the entomologist's record. 



about September 21st, so that I missed them this year, and had to 

 rely on my brother for data. The ab. nigrescens has not been so 

 common as it was three or four years ago. I only got one last year, and 

 my brother took one female this year. My brother also captured, on 

 September 16th, a fine male intermediate between the type and langei. 

 This form, while possessing the ground markings of the type, is thickly 

 powdered, except in the white lines, with dark slate scales. It 

 recalls vividly to one's mind Polia var. nigrocincta. It is not unique, 

 for I took one in August 1905, which I unfortunately allowed to 

 escape. This form I desire to name robsoni in honour of my friend 

 Mr. Charles Robson of Birtley, who, in spite of the fact that he is a 

 confirmed invalid, has done such splendid work in entomology, more 

 particularly in the Aculeate Hymenoptera. 



Notes on Hemithea aestivaria, Hb. (with plate). 



By (Rev.) C. R. N. BURROWS. 

 (Concluded from p. 249). 



On emergence from the egg, the young larva of Hemithea aestivaria 

 (pi. ix., fig. ii), measures l-4mm. in length, by 0*19mm. in width. At this 

 stage the larva of Phorodesma smaragdaria measured l - 7mm. by 

 0'3mm., Comibaena pustulata l-4mm. by O'Smm., and of Geometra 

 papilionaria 2-4mm. by 0'4mm. 



Our larva is then, at its birth, rather more slender than the other 

 species which we have been considering. This is perhaps to be ex- 

 pected, from the size of the perfect insect. Yet there is not that 

 difference in size which I had expected to find. In colour it is a de- 

 cided yellow. The dorsal area is decorated on the thoracic segments 

 with a number of upright, clubbed hairs, and the 1st to 5th abdominal 

 segments carry posteriorly a T-shaped hair (c) resembling in shape 

 that upon the dorsal area of the young larva of Geometra papilionaria, 

 though smaller and less slender. Anteriorly these segments carry a 

 reverted clubbed hair, (d) which is, in the mounted specimen before me, 

 most difficult to make out. The dorsal area of the final abdominal 

 segments appear to be occupied by a few clubbed hairs, with squared 

 tops. The lateral flange is very marked, but much more broken 

 between the segments, and extends from the 1st thoracic segment to 

 the end of the body. It bears, as far as I can see, only one kind of pro- 

 cess (//), a short dark balloon at the highest point, and two perfectly 

 transparent and almost invisible ones of the same shape, but possibly 

 flat, upon the right- and left-hand lower extremities. The 6th 

 abdominal segment bears, as usual, the tactile hairs (e) at the anal end 

 of the portion of the lateral flange belonging there, and there is another 

 similar hair upon the 2nd thoracic segment, below the highest balloon 

 hair, and projecting forward. 



Two very strange clubbed hairs project from the forward edge of 

 the first thoracic segment (/), which may, perhaps, serve the purpose 

 of protecting the eye. 



The spiracles, as in P. smaragdaria and C. pustulata (at the next 

 stage of those species, for they are not visible in this) appear to 

 descend to the 6th abdominal, and then to rise to the 8th. The 

 thoracic spiracle appears to be unusually high up the first segment, 



