220 THE CANADIAN ENTOMOLOGIST. 



legs are shorter, thinner, the femur somewhat inflated at the base above ; 

 the tibia and the first joint of the tarsus about cyHndrical. The hind legs 

 have the femur strongly compressed and dilated ; the tibia strongly cylin- 

 drical ; the basal joint about half as long as the tarsus, a little stronger, 

 and with an external comb of short spines. I do not know if this comb 

 is present in all species ; the two apical joints similar to the middle legs, 

 perhaps a little longer. In some of the wingless forms the first joint of 

 the tarsus of fore legs has a strong external spine. 



Are the fore legs burrowing legs ? Till now no observation is 

 recorded, though their form admits the supposition. That they give help 

 in the spinning of the silken tunnels is very probable. Are the hind legs 

 jumping legs? No observation is recorded, but they seem fitted for 

 jumping. 



Comparing the legs of Embidina with those of Termitina, no simi- 

 larity or relation is to be found. The trochanters in all pairs are very and 

 equally approximate in Termitina. Among the Psocina we find in Atropes 

 divinatoria the trochanters of the two first pair widely separated one from 

 the other one, and those of the third pair much more approximate. 

 For other families a comparison seems of no avail, but there exist similar 

 distances in Odonata nymphse, in Ephemerina and Perlina. Inflated legs 

 are not known among Pseudo-neuroptera, except in Ephemerina in the 

 earlier stages, and these are burrowing legs. 



The abdomen is long, about half the length of the body, a little less 

 broad than the thorax, flattened above, cylindrical below ; the dorsal seg- 

 ments about equal, transverse-oblong, more than twice as broad as they are 

 long; last segment longer, the two before mostly shorter than the others; there 

 are seemingly ten dorsal segments, but the first belongs to the metathorax 

 (segment mediaire), therefore only nine belong to the abdomen ; the dor- 

 sal segments are strong, chitinous, and united on the sides by a large 

 membrane with the ventral segments ; a longitudinal fold bearing the 

 stio'ma. The ventrals are more hyaline, except the two last ones of the 

 males, on which the internal genital organs are situated ; these two are 

 stronger for support, usually darker colored, and polished. All the others 

 are mostly diaphanous, so that the corda ventralis and its ganglia are 

 visible, sometimes even partly the other organs situated in the abdomen. 

 If the segment mediaire is not counted, there are eight ventral segments. 

 Between the last segments of the abdomen are inserted the anal appen- 

 dages. They are two-jointed, stout, very hairy, as long as the two last 



