As will be seen from the two specimens represented by Figs. 1 [male] and 2 [female] on Plate 147, this species bears considerable resemblance to ab. _orobi_ of _Z. trifolii_. The chief differences are in the rather longer fore wings and the more pointed tips of the hind pair; the borders of the hind wings are often narrower. In a broad way, it may be stated that the general tone of colour in the male of _lonicerae_ is bluer than that of _trifolii_. The union of any two or more spots is rarely seen in this species in Britain, but specimens with all the spots joined together have certainly been noted. A yellow form, ab. _citrina_, Speyer (= _flava_, Oberthur), is known on the continent, and Barrett states that it has occurred in England. In ab. _lutescens_, Hewett, the hind wings are orange. Ab. _eboraceae_, Prest, is semi-transparent, steel blue; the spots and the hind wings are pink, the border of the hind wings brown, and the fringes of all the wings are whitish. The caterpillar (Plate 145, Fig. 2) is very similar to that of the last species, but the black marks on the sides are heavier, and the hairs of the body are longer. It feeds on trefoils and clover, and sometimes passes two winters before becoming full grown. The cocoon, which is attached to stems of grass, etc., is generally placed well up above the ground, so that it is readily seen. {340} The moth, which is out in late June and in July, occurs in woods and plantations; also said to be found in meadows, and on rough waste ground, as well as in marshes and salterns. The distribution is much as in the last species, but it is plentiful in East Yorkshire, and the range extends to Cumberland and Northumberland. SIX-SPOT BURNET (_Zygaena filipendulae_).