318 ME. H. BOLTOX OX INSECT-EEMAINS rROlI [Sept. 19x2^^ 



SooMTLACEis (Etoblattixa) bueei, sp. nOT. (PI. XXXIII, figs. 1 

 &2.) 



A short, broad left tegmen, 14 millimetres long and 8 mm. 

 broad. A small portion of the tip of the wing is missing. The 

 length of the wing is thus barely twice its greatest breadth. 



The wing lies in an inverted position upon the surface of a dark 

 shale. The upper surface evidently is evenly and regularly convex,, 

 the concavity of the under surface only being presented to view. 

 The wing-margin is well marked, and stands up in slight relief. 



The costal and anal angles are well rounded, the former being 

 unusually well developed and prominent. 



The wing is broadest across the middle of the costal and anal 

 areas, and tapers equally on the inner and outer margins to the 

 obtuse tip. A slightly-flattened marginal area stretches from th& 

 centre of origin of the veins across the costal angle, diminishing in 

 width, and dying out along the inner margin at a point about five- 

 sixths of its length. The costal angle is broad, strongly rounded, 

 and triangular. The subcosta is sunken, and arises as a shorts- 

 stout vein giving ofi" forwards two forked branches which die out 

 in the middle of the costal angle. Yery slightly above the origin 

 of these branches it divides into two, the inner of which divides 

 again into two somewhat widely-spaced rami. These, and the- 

 outer branch which forks near the margin, pass obliquely forwards 

 to the outer margin. As their obliquity is considerable, the outer 

 branch reaches the margin at the middle of the wing. 



The radius is alarge vein dividing low down, and occupying the 

 greater part of the area of the outer half of the wing. The main 

 stem has an outwardly-directed curve in its lower fifth, after which 

 it passes straight upwards to the middle of the wing-tip. Seven- 

 teen marginal rami arise from seven branches of the main stem of 

 the radius. Of these, the fourth and sixth only are simple, all the 

 rest forking once, with the exception of the first, which forks three- 

 times, and ends upon the margin in six rami. All the branches 

 of the radius remain parallel one to the other and to the marginal 

 rami of the subcosta. 



The general course of the main stem of the radius is such that it 

 marks off an outer half of the wing from an inner portion, which 

 contains the median, cubital, and anal veins. Over the greater 

 part of its course the main stem of the radius is parallel to the 

 costal margin. The rami pass out very obliquely to the margin : 

 their point of origin being low down, as contrasted with the distal 

 terminations on the margin. 



The median vein is continuous at its base with the basal por- 

 tions of the radius and cubitus. At a very short distance above its 

 separation from the common stem it bifurcates in two unequal 

 branches, the outer of which runs almost straight to near the tip 

 of the wing, forking twice in the upper part of its course. The- 

 marginal rami of the median vein occupy the outer fourth of the 

 inner margin of the wing and the inner half of the wing-tip.. 



