H. M. Morris 103 



the present species. Perris (1847) has also given an account of this 

 species under the name of Scathopse punctata Meig. None of these 

 observers however give detailed descriptions or figures, and their accounts 

 are not entirely free from inaccuracies. Sharp (8) has drawn attention to 

 the fact that while Bouche considered that the larva possesses nine pairs 

 of spiracles, Dufour and Perris considered it to be amphipneustic. 



2. THE LARVA. 



The larva when fully grown is about 7 mm. long and 1 mm. broad 

 at its widest part, and its thickness is rather less than its width. It is 

 clearly divided into two regions, (i) the Head, and (ii) the Body. 



The Head is about -48 mm. long, and -43 mm. in width, and is invested 

 by a brown chitinous capsule which is considerably darker and stronger 

 than the covering of the body. The anterior part of the head is rather 

 darker than the posterior part and bears a few short setae, some of 

 which occur in groups. There is no indication of eyes. 



The antennae are small but conspicuous, and consist of a basal 

 portion which bears several processes at its apex, one of which may be 

 a much reduced second joint (Text-fig. 5). 



The labrum is somewhat triangular in vertical section, the apex 

 projecting between the mandibles. The ventral side of the labrum bears 

 many setae of several types and also chitinous processes, possibly of a 

 sensory nature (Text-fig. 3). 



The mandibles (Text-fig. 1) are strong and bear six teeth. Of these 

 teeth five are in a row and are directed in such a manner that in the 

 natural position they project ventrally and slightly inwards, while the 

 sixth tooth is separate and projects dorsally, towards the other five. 

 The maxillae (Text-fig. 2) consist of a basal portion which bears a stout 

 undifferentiated lobe, upon which are a number of setae and chitinous 

 processes. A single jointed maxillary palp is present and bears on its 

 ventral surface an annular depression within which are a number of 

 short projections. On the apex of the palp are a few processes and setae. 

 The labium is composed of a flat dorsal plate, which is supported below 

 by two small sclerites, of which one is anterior to the other. These 

 two parts project beneath the head, and bear a large number of setae 

 (Text-fig. 4). 



The Body is nearly cylindrical, but it is rather flattened dorso- 

 ventrally, while its diameter decreases from about the middle towards 

 both ends (Plate X, fig. 1). It consists of twelve segments and is curved 

 longitudinally, the ventral surface being almost straight and the dorsal 



