. The Cambridge natural history. Zoology. closed collapses like a fan, and also doubles under the anterior part (H) of the wing along the line a a, in Fig. 123, A, the result being similar to that shown by our Fig. 124. It will be noticed in Fig. 123, A, that a small tri- angular area {f) exists at the tip of the wing just where the fold a " takes place, so that when the t wing is shut this little piece is liberated, as shown in t, Fig. 124. In many Blattidae, Blether a (Fig. 132), no trace of this little intercalated piece can be found, but in others it exists in various degrees of
. The Cambridge natural history. Zoology. closed collapses like a fan, and also doubles under the anterior part (H) of the wing along the line a a, in Fig. 123, A, the result being similar to that shown by our Fig. 124. It will be noticed in Fig. 123, A, that a small tri- angular area {f) exists at the tip of the wing just where the fold a " takes place, so that when the t wing is shut this little piece is liberated, as shown in t, Fig. 124. In many Blattidae, Blether a (Fig. 132), no trace of this little intercalated piece can be found, but in others it exists in various degrees of development interme- diate between what is shown in g Thorax porcellana (Fig. 123, A) and in Anaplecta azteca (123, B), so that a, I of the latter may be looked on as e|, greater develop- ment of the condition shown in A at t. It will be noticed that the q superadded part of the wing of 123, B, possesses no venation, being traversed only by the line along which it folds; but in the wing of Diploptera silpha, 123, C, the corresponding part is complexly venated. This venation, as Brunner says,^ is not an extension of the ordinary venation of the wing, but is sui generis. It is curious that though all the degrees of develop- ment between A and B exist in various forms of the tribes Ectobiides and Oxyha- loides, yet there is nothing to connect the veined apex of Diploptera with the unveined Fig. 124.—Hind wing of , Annnlecta BUtta folded, t, Free one Ot JLnapieClCl. triangular area. (After xhe internal anatomy of Blattids has de Saussure.) ^^^^ investigated in only one or two species. There are no great peculiarities, but some featiu'es of minor interest exist. The alimentary canal (Fig. 125) is remarkable 1 Mouv. Syst. Blattaires, 1865, p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harmer, S. F. (S
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
