158 THE ENTOMOLOGIST. 



SO that these markings are rendered very conspicuous; the 

 dark colour of the back assumes somewhat the appearance of 

 a series of inverted pyramids, the apices of which point 

 towards the anal extremity. 1 am indebted to my kind 

 friend Mr. Doubleday for a bountiful supply of these larvae, 

 which fed and throve vigorously on the common dock. — 

 Ediva rd New m an. 



Description of the Larva of Cerastis Vaccinii. — When 

 full-fed it rests in a straight position, but falls off its food- 

 plant and feigns death when disturbed, lying on its back 

 with the entire ventral surface exposed, and the head bent 

 round on one side until it touches the fourth pair of ventral 

 claspers ; head shining, porrected in crawling, otherwise 

 prone, much narrower than the body, and partially received 

 into the 2nd segment : body very obese, velvety, slightly 

 increasing in size from the 2nd to the I2lh segment; 2nd 

 segment with a semicircular dorsal plate, the truncate 

 diameter of which is towards the head. The colour of the 

 head is light brown reticulated with darker brown ; 2nd seg- 

 ment with the dorsal plate dark brown, the anterior and 

 lateral margins darker, the disk traversed by three pale lon- 

 gitudinal lines ; dorsal surface of the body purplish brown, 

 irrorated with indistinct pale markings, some of which are so 

 arranged as to form three very narrow pale dorsal stripes, all 

 of them indistinct, but the medio-dorsal one especially so ; 

 spiracles intensely black ; ventral paler than the dorsal sur- 

 face, semitransparent and tinged with green ; legs greenish 

 brown, tipped with pale brown ; claspers concolorous with 

 the ventral surface. Feeds on Ulmus campestris (common 

 elm). — Id. 



Description of the Larva of Odontia dentalis. — The head 

 is very small, luuch narrower than the 2nd segment ; it is 

 porrected, obscurely triangular, and has a very flat face: the 

 body is very obese, somewhat shuttle-shaped, the skins trans- 

 versely folded, and the entire appearance that of a fat full-fed 

 maggot; the 2nd segment has a broad dorsal plate, very sca- 

 brous, and divided by a slender median longitudinal line ; 

 and on each side of the 2nd segment there are also two sca- 

 brous spots; the dorsal surface of the 13th segment is 

 covered with a scabrous plate ; the legs are short, pointed 

 and very horny : the ventral claspers are short and mode- 



