, 56 Br. H. Woodward — British Carboniferous Cockroaches. 



which is again forked. The ' externo-median ' vein continues parallel 

 to the scapular vein, for a slightly longer distance before it 

 branches at the extremity of the wing into three inferior veins, two 

 of which are again forked. The interno-median vein occupies about 

 one-fourth the entire area of the wing ; it gives off three almost 

 equidistant inferior bi'anches, none of which appear to be forked. 

 The anal vein is nearly straight, and has three other almost parallel 

 oblique simple veins occupying the anal area. 



The wings of the Mylacridce have the veins spreading in a fan- 

 shape and appearing to arise in a single point, or near a single point, 

 close to the base of the wing. (See Woodcut Fig. 5, ante p. 55.) 



On comparing our English specimen with Scudder's figures on 

 plate V. of his memoir, already referred to, one is struck with the 

 general likeness they present ; but the wings of Mylacris seem to be 

 all more complex in the forking of the secondary or branch-veins 

 than in our specimen, which agrees best with Scudder's genus 

 Lithomylacris, and with such species as L. Pittstonianum (pi. v. figs. 

 4 and 10 o}). cit.) or L. simplex (fig. 5, op. cit.) ; but our form is cer- 

 tainly distinct from any species figured by Scudder. I have great 

 pleasure in dedicating this the second English form of Blatta met loitli 

 hy Mm, to its discoverer, Mr. James W. Kirkby, of Ashgrove, Leven, 

 Fife, N.B., who has contributed so largelj'^ by his researches to 

 increase the fauna and flora of the Carboniferous series of Great 

 Britain. 



Leptoblattina exilis, gen. et sp. nov. PI. II. Figs. 2 and 3. 



The species about to be described is represented by two examples, 

 each of which is in a nearly perfect state as regards the greater 

 part of the insect, but neither specimen exhibits the legs (save 

 only a fragment of one). In both specimens there is a portion of 

 the head preserved (more being exposed in Fig. 3 than in Fig. 2). 



The prothorax (or pronotal shield) is preserved entire in both, and 

 the meso- and metathorax, followed by ten abdominal segments more 

 or less distinctly to be made out, and having a pair of appendages 

 (cerci) attached to the 10th segment in both (but only drawn by the 

 artist in Fig. 3). 



Two pairs of wings are seen in both specimens, springing from 

 the lateral borders of the meso- and metathorax, with their outlines 

 fairly exposed (especially so in Fig. 2). The total length of the 

 original of Fig. 2 (which, like Fig. 3, is drawn twice natural size) 

 is 35 mm. 



Head. — The head is very small and somewhat bluntly pyramidal 

 in form, and measures 2 mm. in breadth at its base, where it dis- 

 appears beneath the pronotum, and is 2 mm. in length. There is a 

 suture visible down the centre (in Fig. 3^), which divides the two 

 epicranial plates, at the sides of which the eyes would be seen; in 

 front of the epicranium a small projection no doubt represents the 

 clypeus with the labrum at its extremity. (This is only indistinctly 

 shown in Plate II., which was drawn and printed off, before the final 

 touches of the needle developed these additional points of interest.) 



