1994 The Zoologist— February, 1870. 



extremity resting against the side of one of the segments between the 

 fourth and the eighth. Legs twenty-two in number ; the fourth seg- 

 ment apodal. Head nearly globular, depressed anteriorly ; smooth on 

 the vertex, clothed with exceedingly fine while hairs, and of a pale 

 brown or sordid yellowish gray. On the vertex a wedge-shaped dark 

 or very dark brown spot ; two pale spots or maculae behind the eye- 

 spots, which are round and black. Mandibles luteous. Some individuals 

 are found having the head purple as far as the eyes, with the excep- 

 tion of two small pale triangular marks obliquely above the eyes, 

 thence obscure yellow. The back is often more or less humped just 

 behind the head. 



The back is obscure green, in some individuals moderately dark, in 

 others paler, as far as the stigmata. On the neck, above the first 

 stigma, is a brown or blue smear. The ventral surface and the sides 

 below the stigmata are sordid white, sometimes approaching a yellow 

 tint; the legs are of the same colour. On the anterior coxae are some 

 little black lines; above each median and posterior leg is a gray spot, 

 sometimes replaced by a black line, as in fig. 2. Brown spinous 

 points above the anus. On each segment of the abdomen (see fig. 4) 

 are three rows of little white spines, the anterior row containing only 

 four or five, the two others ten or twelve each. The thoracic legs are 

 armed with brown claws. The stigmata are white ; the large tracheae 

 can be perceived through the skin. Other individuals were observed 

 having the neck darker than the back, but wanting the marking on the 

 neck so clearly shown in figs. 1 and 2 ; they also had the thoracic 

 legs of a greenish tint. Bouche gives a description of the larva 

 differing from this in some points : he says, however, " Uber den 

 dunkelgriinen Riicken liiuft eine hellere Linie und vier Reihen 

 schwarzer Flecke, so dass auf jedera Abschiiitt vier zu stehen 

 kommen." The largest of these black spots were observed to be 

 above the small brownish yellow stigmata. He also noticed above 

 the abdominal legs two nearly contiguous rows of pale gray spots. 



Brischke also speaks of black spots dividing the green from the 

 sordid white colour of the sides, and which are thus above the 

 stigmata. Dahlbom likewise mentions these same spots, at least if 

 1 rightly understand his words, " macularum seriebus longitudinalibus 

 utrinque duabus nigris." I have not observed any such spots above 

 the spiracles in the examples I have had. 



Observers are pretty well agreed as to the life-history of the larva, 

 with the exception of one poinl, namely, the number of generations in 



