THE CANADIAN ENTOMOLOGIST. 153 



4. The antennae seem to be shorter and the joints partly more globular 

 in the female, a character not uncommon among the Psocids. 



5. The difference of the meso- and metathorax among the sexes is not 

 much marked, owing probably to the fact that the wings of the male imago 

 are inserted with a very narrow base, which gives a very fine membranous 

 fold farther down along the sides. The sternum of each of the three 

 segments of the thorax is divided in three parts. The segment mediaire 

 is the last part of the metathorax, and the dorsum of this segment belongs 

 to the metathorax. The abdomen has only seemingly 10 dorsal segments. 



6. The apex of the first tarsal joint of the fore legs of the female has 

 an external spine, longer than the second joint, conical, very sharp. I 

 have not yet fouud such a spine in any male. 



7. The anal appendages of the abdomen are symmetrical in the 

 female ; asymmetrical in the male, similar to Blatta. I do not know that a 

 similar asymmetry exists among Pseudoneuroptera. 



I am at a loss to understand where the larva described, p. 384, fig. i, 

 by McLachlan, belongs. The whole figure represents well a younger 

 female only 12 mill, long, except that the eyes are a little larger and more 

 visible from above. The description states, " just the same asymmetry as 

 in the imago." This would indicate a positive difference. But there is 

 not to be seen in the figure any asymmetry, and the segment before the last 

 seems to be shorter. The description mentions not the ventral parts, 

 which would be deciding. If it is not a female — and it can hardly be 

 assumed that younger females should possess asymmetrical appendages — 

 it can not be a male larva, being longer than the largest male imago, and 

 not showing the slightest traces of wings. Perhaps a new examination of 

 the type will solve the question. I can not accept the starved nymph, 

 p. 384, fig. 2, as a nymph. The wing cases of nymphae in Orthoptera 

 (and Pseudoneuroptera) are always more or less connected at base, and 

 never entirely free as in the figure. Perhaps the specimen represents a 

 so-called short-winged form, which occurs not uncommonly among Perlids, 

 Psocides and Termites. The figure in Gard. Chronicle (fig. 157) would 

 represent a female (the external spine of the first tarsal joint of the fore 

 legs is visible) if the wing sacs of the metathorax were not so well marked. 



There is apparently more detailed information needed on 0. Michaeli. 

 As the large orchid growers here are accustomed to buy their East Indian 

 species mostly from London nurseries, I have taken steps to ascertain if 

 any Embids have been imported with the plants. 



