in a more normal manner, by means of a stigma placed at the base of the piercing process. A similar larva exists in _Haemonia_; which genus is additionally interesting from the fact that the imago lives entirely submerged. It is not known how it breathes. This genus is the only member of the Chrysomelidae that does not possess the structure of the feet that is characteristic of the Phytophaga. The late Professor Babington about sixty years ago found _H. curtisi_ at Cley on the Norfolk coast on submerged _Potamogeton pectinatus_, but it has not been met with there for a great many years. The larvae of Criocerides are of two kinds, in one of which the {281}body is peculiarly shaped in conformity with the curious habit of using the excrement as a covering. The larva is less elongate than usual, and has the anus placed on the upper surface, and formed so that the excrement when voided is pushed forward on to the Insect; here it is retained by means of a slimy matter, and a thick coat entirely covering the creature, is ultimately formed. The larva of _Lema melanopa_ is not uncommon about Cambridge, where it feeds on the leaves of growing corn. It is a remarkable fact that even in one genus the species have some of them this habit, but others not. The species of _Crioceris_ living on lilies—_C. merdigera_, _e.g._—are noted for possessing it; while _C. asparagi_ does not protect itself in this way, but emits fluid from its mouth when disturbed. This larva is a serious nuisance in some localities to the cultivators of asparagus. The eggs are deposited on the stems of the plant—as shown in our figure—sometimes in great numbers. The perfect Insects of many of the Criocerides possess a stridulating organ. Two contiguous areas at the base of the last dorsal segment, where they can be rubbed by the tips of the elytra, are slightly elevated and bear very close and fine straight lines. [Illustration: Fig. 143—_Crioceris asparagi._ A, Eggs in position on stem of asparagus; B, one egg much enlarged; C, young larva. Cambridge.]