The Zoologist — October, 1868. 1417 



flies have but two broods in the year, while many have but one, and 

 even some Cimbices, as a rule, pass two years in the larva state. We 

 have also to do with a species, which, if it be not yet classed among 

 injurious insects, will probably soon have to be placed in that category. 

 If I remember rightly Dr. J. Wttewaall informed me that more than 

 one cherry-orchard in Gelderland had been defoliated by the larvae of 

 this species. 



My first acquaintance with these larvae dates from July, 1845, at 

 which time I found them in my garden on the bird cherry and hawthorn. 

 I have since found it in great numbers on cherry trees. Hartig and 

 Brischke found it on the cherry; the latter author observed it on the 

 raspberry also. The larva (figs. 1 and 2) attains a length of 13 mm. : it 

 is depressed and laterally expanded ; body hirsute ; legs twenty. The 

 colour of the head varies in different examples; in some it is shining 

 ochre-brown, the upper jaws being dark brown ; on the vertex is a 

 quadrate black spot, and two circular black ones forming rings round 

 the eyes; in others (fig. 4) the head is greenish, irrorate with brown ; the 

 upper jaws green, with the apices ferruginous, a transverse brown spot 

 between the eyes, a black rounded spot on the vertex, and two similar 

 ones on the sides ; in all cases the head is pretty closely beset with 

 gray hairs. The ventral surface and sides of the body, as also the legs, 

 are sordid greenish white ; dorsum grayish or brownish olive-green, 

 and not cinnamon-brown, as represented in Brischke's figure, nor 

 bright green, as described by Hartig. I have only once observed a 

 full-grown larva, which had the dorsal surface of the four anterior 

 rings ferruginous : this was in the month of August, and the larva in 

 question was on a Morelle cherry tree. A narrow yellow line runs 

 along the middle of the olive-green space. On the back are two 

 interrupted rows of small projections, always in little clusters of three 

 or five, as shown at fig. 5, which represents the back of the fourth 

 abdominal segment. The back and sides are covered with pretty long 

 blackish hairs. Between the head and the green coloured dorsum is 

 a greenish white transverse line ; a similar but somewhat undefined 

 line is also found at the base of the last segment. 



The trophi of the larva are described and figured by Hartig. 

 There are no distinct scales on the thoracic legs ; the claws of these 

 legs are small and of a brown colour. The fourth and penultimate 

 segments are apodal. 



The larvae were generally on the under surface of the leaves, and 

 ate holes in the centre portions, as shown in the left-hand leaf in our 



SECOND SERIES — VOL. III. 3 E 



