OF INSECTS. 
319 
of the tnouth, will he sufficient to distinguish them. 
But it has been recently shown, that two minute 
appendages, attached to the sides of the mesothorax, 
may be regarded as representing anterior wings; 
these have been named pseudelytra, or prebaianciers. 
The structure of the other parts will be well under- 
stood from the dissections on PI. XXXIII. which we 
have taken the liberty to copy from Mr. Curtis’ Brit. 
Ent. as they are the most satisfactory that have come 
under our observation. The head (E) is broad and 
sessile, with a triangular projection in the centre ; 
eyes lateral, globose, and formed of few large facets ; 
antennae with more than one branch (F 1, and G) ; 
palpi (H) large and two-jointed. The prothorax 
and mesothorax (I and K) are very short, being 
narrower than the head ; the mesothorax (D 6), on 
the contrary, is large and long, and produces a large 
scutellum (D*), which projects over the abdomen, 
the latter composed of 8 or 9 joints, and somewhat 
incurved at the extremity. In Stylops the anterior 
wings appear as represented at K 9. It is on ac- 
count of their twisted appearance that the name 
Strepsiptera (from ffrgetyc and trregov) has been ap- 
plied. The hinder wings, or what may be regarded 
as the only wings, if we consider their function, are 
very ample, folded longitudinally like a fan, the ner- 
vures remarkably fine (L 10). The legs are short 
and compressed, without spines, the tarsi (which are 
four-jointed,) having each joint furnished with a 
pubescent membrane (K 8*), claws wanting. 
Rossi was the first who observed one of these 
