THE CANADIAN ENTOMOLOGIST. 185 



In moulting, the skin of the head spHts along the eyes, and rises like a 

 lid at the front. In the body, it splits longitudinally along the middle 

 line of the thorax, and down the dorsum to the third or fourth abdominal 

 segment. As mentioned before, the rostral lancets are moulted entire, 

 including their insertion in the interior of the head, as well as the tracheae. 

 In this connection, it may be mentioned that the cast skins are excellent 

 for the study of the hairs and other external characters, the number of 

 antennal and rostral joints, etc. 



Adult. — The following proportions and dimensions are apparently not 

 mentioned by the describer of the species. Antennae four- or five-jointed, 

 the latter if the minute jointlet between the second and third joints is to 

 be taken into account. Proportion of joints, approximate, 24: 17: 2 + 22 : 

 27, from balsam mount, somewhat distorted; these proportions are only 

 approximate, as different specimens differ slightly from each other, and 

 even the right and left antennas are not alike. A dry specimen, mounted 

 for the cabinet on a paper point, gave these proportions: 23 : 16 : 2 + 23 : 

 30. The first joint is stout, curved; second not so stout; third slenderest; 

 fourth fusiform, stouter than first. The stout tactile hair in the sense pit 

 near the apex of the first joint still persists in this adult. The rostrum is 

 four-jointed, as in the nymphal instars ; the proportions are : 8 : 4 : 27 : 

 13; head, length: width:: 30: 45; eyes: vertex:: 11 : 22: 11. The 

 ommatidia are round, as they are not as close together as in the 

 compound eyes of other Heteroptera, and this is also the case in all the 

 nymphal instars. , 



In the wingless form, the pro-, meso- and metathorax are clearly 

 indicated as rings. Including the genital, there are nine apparent segments 

 in the male, as seen from above. The spiracles are hidden on account of 

 the extreme hairiness of the bug. The legs have a tibial comb on the first 

 and second pairs, as in the nymphs. The peculiar cleft spine of the 

 posterior tibise, so noticeable in the nymphs, appears to be single in the 

 adult, and there is now interiorly a comb-like arrangement of close-set 

 spines, thick hairs, or bristles. 



When the adult is just emerged from the nymphal skin, it is a creamy 

 white, with dark eyes, claws, etc. This is the case also with the nymphs. 



In the nymphs, the third antennal joint appears to be sunk in a deep, 

 cujvshaped depression in the second joint, and there is a minute jointlet 

 entirely concealed in this depression. This structure does not appear till 

 the second instar, the joint appearing pedicellate in the first. In the 

 adult, however, the joiiitlet does not appear to be sunk in this manner. 



