226 THE CANADIAN ENTOMOLOGIST. 



The winged species of Embia are intermediate among Oligotoma and 

 Olyntha. The body is stronger and more flattened above than in 

 Olyntha ; the head is shorter, about quadrangular, but the antennse are as 

 short as in OHgotoma ; the prothorax is shorter and broader than in both, 

 but near to the head more narrowed ; the thorax is still larger than in 

 Olyntha ; the legs are as long and as strong as in Oligotoma ; the 

 wings as long as the body (Oligotoma), but broader, with the venation 

 similar to Olyntha ; the abdomen is broader and more flat than Olyntha, 

 but with the shorter appendages of Oligotoma. Asymmetry is known only 

 in the female sex. Embia is known only from the old world in the 

 countries around the Mediterranean and Persia. 



The knowledge of the three groups is not sufficient to assert that all are 

 only subgenera or genera ; in the last case I believe that Olyntha and 

 Embia can not be united. 



There can be no doubt that the Embidina belong to a peculiar and 

 well defined family, and cannot be combined with any other family, 

 though a number of characters are found represented in other families. 



The body is slender, elongate and flat above ; the abdomen repre- 

 senting half the length of the body ; the head is free, not inserted, small, 

 flat, quadrangular or ovoid ; the eyes are exactly in the front corner of 

 the head, and in the imago state similar to aggregate eyes ; ocelli, none ; 

 no dividing sutures of the head exist ; antennre as long as the body or 

 half as long, praeocular, monihform or partly filiform, slender and very 

 fragile; mouth parts decidedly of Orthopterous character; maxillary palpi 5 

 jointed ; labium bilobate, the inner lobes transformed into a spinning ap- 

 paratus, as in Psocina, but with 3 jointed labial palpi, and without the 

 peculiar maxilla of Psocus. Prothroax much narrower than the head, 

 elongate, or as long as broad ; always with a dorsal transverse furrow 

 after the anterior third ; thorax strong, oblong, the mesothorax longer ; 

 each segment of thorax with three dorsal parts, the last one of the 

 metathorax (segment mediaire) like the abdominal segments. Abdomen 

 flat, about equal, with nine transverse oblong dorsal segments and eight 

 ventrals ; at the tips on each side a bijointed appendage, short, or as long 

 as the last segments ; between them the male genital apparatus, just at 

 the end of the abdomen ; the female opening at the base of the seventh 

 ventral segment ; the appendages, the male genital apparatus and the last 

 dorsal and ventral segment show, at least in certain forms, asymmetry. 

 Wings not deciduous, narrow, rounded on tips, as long or a little longer 



