NEMORIA VIRIDATA, LINN. 138 



specimens from the same brood, which suggested the form, but would 

 not bear comparison with the original. 



6. ab. mathewi, Bankes. — Since writing the above, Mr. Bankes has 

 examined his specimens carefully, and has found material to establish 

 ab. mathewi {Entom. Record, vol. xix. (1907), p. 210). He writes: "The 

 points of distinction from all named forms are — both forewings and hind- 

 wings dusted with orange scales. These are fewest towards the bases, but 

 become exceedingly numerous posteriorly, and are especially noticeable 

 between the subterminal line, and the termen of the forewing, and 

 the corresponding portion of the hindwing. In the five examples 

 examined, the thorax also differs from that of the ordinary forms, 

 being of a dingy greenish-buff, and the actual ground colour of the 

 wings is rather paler, and somewhat tinged wath dingy buff. 



This description does not in any way cover the specimen which is lost 

 ( = ab. rufotincta). I made my observation in the semi-darkness of the 

 auction room, but made a note of what I saw. I described the specimen 

 in my note as red-flushed, and this seemed to agree with the opinion of 

 the two or three to whom I pointed it out. I much regret that 

 another engagement prevented my remaining in the room, and I was 

 compelled to leave long before the sale commenced. 



6. ab. olivaceo-manjinata, n. ab. — This is a form in which the 

 insect may or may not be purely typical, but the fringes of all the 

 wings are dark olive-green. There is such a specimen m Mr. Sidney 

 Webb's collection, which is labelled as from the Witherslack locality.. 

 This form is parallel with the aberration of H. aestivaria in Mr. Prout's 

 collection, in which the spotting of the cilia has become continuous, 

 and which is mentioned in my paper on that species. 



7. ab. concavilinea, n. ab. — A form in which the single line on the 

 hindwing is reversed, that is to say, it is bent towards the base instead 

 of as usual, away from it. This form appears to be far from un- 

 common. One wonders how it comes about that lines can be turned 

 back in this manner, and recalls one of the distinctive differences, 

 between Lasiocampa <piercus and its var. callunae. 



8. ab. caerulescens, n. ab. — This blue-green form seems to occur in 

 all the " Emeralds," and makes a striking feature in a series of the 

 insects when viewed in a good light. 



The distinctness and brilliancy of the transverse lines vary much. 

 They are generally entire or nearly so, but sometimes made up of 

 lunules. There is also a considerable difference in the distance apart 

 of the two lines where two are present. Of 23 specimens, which at 

 present form my series, only one^ agrees with the Linnean type. 

 I do not infer from this that the single-lined form is rare in England, 

 for I have no means of ascertaining. Of my specimens, seven are of 

 the faded yellow-pink description with little of the original green 

 remaining. 



So far for the imago, I turn now to the young larva. Meyrick's 

 description of the full-grown larva is : — 



Pale green, with purplish dorsal, sometimes connected, marks. Subdorsal line 

 whitish, lateral flange pale yellow. Head purplish. 



And, in the generic diagnosis, he places Nemoria viridata with 

 Hemithea aestivaria in the genus Nemoria, he describes the larva as 

 "transversely wrinkled, with the head and 2nd segment {i.e., 1st 

 thoracic) bicuspidate." 



