MESOZOIC COCKROACHES. 481 



Aporoblattina incompleta. 



[Without name], Brodie, Foss. Ins. Engl., PL 8, fig. 13. 

 Blattlna incompleta Griebel, Ins. Vorw., 317. 



This species differs somewhat from the preceding forms and is very imperfect, but 

 seems to belong here, and to he not distantly related to A. Westiooodi, but with the ex- 

 ternomedian area much more fully developed, with nervules simulating those of the scap- 

 ular area. Both scapular and anal areas are wanting. 



Length of fragment, 8.5 mm.; width of same, 3.75 mm.; probable length of wing, 11 

 mm.; prohahle breadth, 4.25 mm. It comes from the English Lias. 



Aporoblattina recta. 



[Without name], Brodie, Foss. Ins. Engl., 33, 119, PI. 5, fig. 3. 

 Blattina recta Gieh., Ins. Vorw., 318. 



This also Westwood looked upon as allied to Corydalis, hut it is clearly related to the 

 others. It is a small and slender species, but, excepting for the changes in neuration 

 which this involves, closely resembles A. McLachlani. The externomedian branches 

 only near the tip and entirely beyond the extremity of the mediastinal area, occupying 

 the tip with its forked branches, which, in contradistinction to all the other veins are 

 both superior and inferior ; all the other branches are simple. 



Length of fragment, 6.5 mm.; probable length of wing, 8 mm.; breadth, 2.75 mm. It 

 comes from the Wealden of the Vale of Wardour. 



Aporoblattina nana. 



Blattina nana E. Gem., Flotzform. Mecklenb., 30, PL 6, fig. 2. 



This minute species appears to belong here, though it differs conspicuously in the more 

 longitudinal and straighter branches, most noticeable in the internomedian area. It is a 

 little difficult to tell where the separation of the scapular and externomedian veins should 

 be placed, as the base is broken, but it would appear probable that Geinitz's construction 

 of the neuration is correct, in which case the very small development of the scapular is a 

 marked feature of the species. 



Length of fragment, 5 mm.; probable length of wing, 6.5 mm.; breadth, 2.1 mm. It 

 comes from the Lias of Dobbertin, German \ . 



Aporoblattina exigua sp. nov. 



[Without name], Westwood, Quart. Journ. Geol. Soc. Lond., x, 390, 396, PL 18, fig. 38. 



This species, represented by a wing which Westwood regarded as orthopterous, seems 



to belong here and to be nearly related to A. nana, than which it is not much larger. 



The mediastinal vein runs to the middle of the outer half of the wing. The scapular 



