no 



Biolo(j]i of Necrobia ruficollis 



NOTES ON THE LARVA AND PUPA. 



The Egg is described and figured by Heeger ((8) pi. VIII, fig. 13). 

 Larva (fig. 1): this is fully described and figured by Heeger; Ferris 

 also describes it ((19) p. 51), and gives outlines of 

 the terminal hooks in lateral view and of the 

 ocelli ((19) pi. VII, figs. 243-4). Heeger's figure 

 shows the larva as broadening markedly behind 

 the middle, this is more noticeable in some speci- 

 mens than in others, depending partly on the 

 degree of extension of the segments. Fig. 1 

 shows a larva which had died with the first three 

 abdominal segments retracted and the others 

 much extended. The dark and light mott lings 

 are somewhat asymmetrical and variable, but in 

 my material there is always a fairly well-marked 

 mid-dorsal pale line, broadening in the middle 

 of each segment, and continuous from the eighth 

 (penultimate) forwards to about the third ab- 

 dominal segment: in front of this it becomes 

 broken up and irregular. Heeger's figure does 

 not show this arrangement of markings. The 

 ventral surface is much paler, with the dark 

 mottlings very faint, but still discernible. Ventro- 

 lateral regions very pale, but a marked dark 

 patch on either side nearer the front margin of 

 each segment. 



The setae in my material are yellowish or 

 reddish testaceous. They are more numerous 

 than those shown in Heeger's figure, there bemg 

 two bands of setae across the dorsum of each ab- 

 dominal segment (at any rate in segments 1-7), 

 and the setae of each band not always standing in a single row. In 

 Fig. 1 they are indicated, but it is not attempted to show every one. 

 They are more numerous in the dorso-lateral regions, where they include 

 some very long ones. There is a small group laterally in the constriction 

 between each two segments. Ventrally the segments appear at first sight 

 bare, but with a high power two bands of very short setae can be seen 

 extending across, and a group of slightly longer ones on either side. 

 The terminal chitinous hooks closely resemble those of Necrobia 



Fig. 1. X ap|jrox. 10. 



