THE CANADIAN ENTOMOLOGIST 



331 



There are no trilocular pores. The anal ring appears to be very 

 small and is entirely obscured by the heavily chitinized anal lobes. 

 In the first stage larva the anal ring is extremely small and 

 appears to bear but four very minute setae. The terminal seg- 

 ment is not chitinized. There are marginal and two submedian, 

 longitudinal rows of 8-shaped pores. The antennae are five-seg- 

 mented. 



Fig. 15. — A, posterior end of abdomen of first stage larva of Mycetococcus 

 ehrhorni (Ckll.); B, posterior end of the abdomen of Cerococcui bryoides 

 (Maskell); C, tubular duct of Mycetococcus corticis (Towns. &CkIl.);D, 

 osterior end of the first stage larva of M. corlicis. 



Mycetococcus corticis (Towns.). 

 (Fig. 15 C, 15 D.) 



1898. Cerococcus corticis Towns. & Ckll., Jn. N.Y. Ent. Soc, 

 vol. 6, p. 170. 



1901. Cerococcus corticis Towns. & Ckll.; Patterson, Proc. 

 Calif. Acad. Sci., ser. 3, vol. 2, p. 387, pi. 23, figs. 23-28. 



As in the case of M. ehrhorni there are certain details that 

 former authors have overlooked. 



The derm in all stages is entirely destitute of 8-shaped pores. 

 In the adult there are numbers of quite large, tubular ducts of a 

 type quite unlike that usually found in the Asterolecaniinae and, 

 in fact, unlike any that I have seen. This peculiarity arises from 

 the fact that the delicate filamentous prolongation of the duct 

 arises some distance before the apex of the larger portion. The 

 anal ring is quite large and cellular. 



The first stage larva bears a few trilocular pores instead of 8- 

 shaped pores. The anal ring is very large, heavily chitinized and 



