278 ENTOMOLOGICAL NEWS. [J une . '08 



the largest. Each of the abdominal and thoracic annuli are well 

 armed with short, closely set spike-like hairs, which are more 

 or less arranged in girdles, due to the annular divisions. Be- 

 sides these short hairs there are two or four longer curved hairs 

 on the dorsal surface of the posterior annulus of each segment, 

 likewise one or two along the sides of the same annuli, and two 

 pairs of similar hairs on their ventral surface. The paired 

 ventral hairs on the thoracic segments are mounted upon small, 

 widely separated, circular plates, similar to the dorsal plates on 

 the posterior annuli except much smaller. 



In living specimens the internal organs in the region of the 

 fourth and fifth abdominal segment show creamy- white through 

 the body wall. This did not appear in the Florida larvae and is 

 also obsolete in alcoholic specimens. No signs of anal tracheal 

 gills are present. The thoracic air nipples are present on the 

 dorso-lateral portion of the second pro thoracic annulus. As in 

 the case of the Florida specimens, these were not seen to be used 

 by the larvae for breathing. 



The larvae have the greedy habit of engulfing everything 

 that they can get hold of. The alimentary canal is continually 

 distended with food. The internal organs appear very dis- 

 tinctly through the body-wall, especially in case of specimens 

 preserved in alcohol. The protrusions surrounding the anal 

 opening are much more pronounced than in the Florida speci- 

 mens. A test was made to determine the length of time they 

 could live under water without coming to the top to breathe 

 and the limit was found to be about twenty-four hours, as in 

 the case of the Florida larvae. 



PUPA. 



The pupae are found hidden in the debris at the surface of 

 the water, where they are continually kept moist and where 

 they can protrude their thoracic breathing tubes out above the 

 surface. The pupae are somewhat larger than those from Flor- 

 ida and the abdominal spines are slightly less developed. There 

 is a very marked difference in the size of the male and female 

 pupae. The latter are both longer and more heavily built. In- 



