ZooL— Vol. II.] PATTERSON— NOTES ON CEKOCOCCUS. 391 



original description, it was incorrectly stated that the insect 

 has no antennae. These organs (fig. 16) are minute and 

 unsegmented, irregularly cone-shaped and truncate at the 

 tip, bearing several long stiff bristles and a number of short 

 ones. In this stage the insect has remarkably large tracheal 

 tubes which may be seen plainly when the specimen has 

 been boiled in K O H. The spiracles, also, are easily seen. 

 Double pits connected with large glands are scattered 

 irregularly over the dorsal surface of the body, and single 

 pits are very numerous in certain regions. Large groups 

 of the latter extend from the margin of the body to each of 

 the spiracles, and in each of the five segments next to the 

 last a distinct band of single pits extends across the body. 

 The last segment has a small group near the base of each 

 terminal lobe. 



The sac of the insect (fig. 17) at this stage is not so con- 

 vex as that of the adult and is somewhat like an air-cushion 

 in form. The larval skin, which is orange-colored, is im- 

 bedded in the wax at the center of the dorsal surface; and 

 the secretion forms two rings about it. SHghtly dorsad of 

 the posterior end of the case is a tubercle in which is an 

 opening. 



Adult Female. — The adult female is elliptical in out- 

 line and more or less distinctly segmented. The terminal 

 segment is not strongly chitinized, and the caudal lobes, 

 which are not so prominent as those of C . ehrhorni, each 

 bear a long bristle and several short ones. Double pits 

 in large numbers are scattered over the surface of the 

 body, but single pits do not appear to be numerous as in 

 the intermediate stage just described. The antennae are 

 similar to those of the preceding stage (fig. 16). The sac 

 of the fully developed female (fig. 18) is about 6 mm. long 

 and 5 mm. wide. It is irregularly elliptical in outline, very 

 convex above, and somewhat flattened below. The larval 

 skin is slightly cephalad of the center of the dorsal surface, 

 and along the lateral margins are a number of little pro- 

 jections, probably corresponding to the segments of the 

 body. The wax forms a smooth sheet, as if the filaments 



