62 THE CANADIAN ENTOMOLOGIST. 



none, and the subterminal, which has two on each side. On the thorax 

 and head they are smaller and fewer in number. Length of body 1.25 

 m. m. 



Apterous viviparous $ . " Dull bluish black ; tergum with the seg- 

 ments marked by strongly impressed lines and covered by white down in 

 square checker-like spots. Length 0.16 in." (4 m.m.) Fitch. 



The abdomen is covered by long shreds of down, while the thorax 

 and head are simply covered with whitish dust. Antennae 5-jointed by 

 division of third (?) joint of larval antenna into huo, while the second 

 joint has apparently shortened. 



Fresh specimens of winged ^ cleaned in alcohol are described in 

 MS. by Dr. Hagen as '' head and antennae black, prothorax pale dirty 

 whitish ; thorax chestnut brown ; abdomen pale whitish gray, above with 

 six rows of blackish spots ; beneath with four blackish fine lines on each 

 side near the middle, not reaching the tip ; legs brown ; tibiae and tarsi 

 paler ; wings opaque, veins pale, except the mediana of fore wings, which 

 is brown. Full grown nympha is similar to the imago ; the wing cover- 

 ings are black." 



Alcoholic specimens of winged viviparous $ were dark bluish black 

 with the white filaments on the abdomen less prominent than in the 

 apterous ^ ; head and thorax covered with whitish powder. The antenna 

 are 6-jointed by division of the third (?) larval joint into three, the second 

 joint shortening ; joints 3-6 are marked with transverse irregular inter- 

 ruptions lined with a thin membrane, while the terminal and subterminal 

 joints cpntain sensitive glands, as do also these joints in the larva and 

 apterous %. Length 4-5 m.m. Expanse 10-12 m.m. 



The sensitive glands of the antennae, which niay be seen in the ter- 

 minal and subterminal joints, are cavities or funnel-shaped openings in 

 the crust, which are lined by a membrane which expands in the middle 

 into a glandular body from which arise from two to four papillae. In 

 some cases within the border of the cavity can be seen minute cilise 

 forming a fine fringe. These organs undergo but little modification during 

 the metamorphoses of the insect. They are prominent in the embryo 

 taken from the viviparous female. In the adult, however, they are par- 

 tially obscured by other irregularities in the surface. In the winged 

 individuals, where the antennae are 6-jointed, the terminal joint has at tip 

 five short papilla-like spines, and a little below these four slightly granular 

 elevations, immediately beneath which is an interrupted space in the 



