MESOZOIC COCKROACHES. 483 



APPENDIX. 



There are a few species, imperfectly preserved, concerning- which we can come to no 

 satisfactory conclusions. Such is Ritlima ramificata Giebel (figured by Westw., 

 Quart. Journ. Geol. Soc. Lond., x, PL 15, fig. 20), in which all the veins, or at any rate 

 all but one are represented as originating from a single root. It is perhaps an Elisama. 

 Another is Blattina incerta Geinitz (Zeitschr. deutsch. geol. Gesellsch., 1884, 571, 

 PL 13, fig. 2) , which the author compares to Ctenoblaltina Langfddti, a resemblance 

 which would not have been mentioned if a mistake had not been made in the interpreta- 

 tion of the margins of the wing of the latter species, as mentioned above. By the dis- 

 tance of the mediastinal vein from the margin, it would appear to be a front wing; but 

 for that and for the corresponding wry strongly arcuate front margin, it would appear 

 to be a hind wing, and to be not far removed from the wings I have placed in Aporo- 

 blattina. As, however, it is clearly a front wing, as all the veins appear to be independ- 

 ent, and as its general form and the general distribution of the areas are very different from 

 that of mesozoic cockroaches in general, I am strongly inclined to doubt the Blattidean 

 relationship claimed for it, and to look at it rather as a neuroj^terous wing allied to Hagla. 

 There is also the mere fragment of a wing figured by Westwood (Quart. Journ. Geol. 

 Soc. Lond., x, PL 15, fig. 19) which is probahly less than a quarter of the whole wing, 

 and the apical portion at that, which is probably quite indeterminate. Ileer refers it to 

 Blattidium. 



The fragment of a wing figured by Brodie (Foss. Ins. Engl., PL 5, fig. 6, cf. p. 121) 

 from the "Wealden is apparently the anal area of a cockroach, in which the upper curve 

 represents the anal furrow and the lower, with the veins falling on it, the inner margin 

 of that part of the wing. It seems to have belonged to a species about the size of 

 Ritlima Westwoodi. 



The insect from Solenhofen (Jura), which Heyden (Palaeontogr., I, 100-101, PL 12, 

 fig. 5) figures under the name of Blabera avita, but which he says " einer eigenen Gat- 

 tung angehoren mag," on account of the shape of the tegmina, has rather on his plate 

 the appearance of a Cybister or an Hydrophilus, but until further examination of the 

 original or of other specimens, cannot be definitely fixed. There is nothing, either in 

 shape or neuration (which appears to be very obscure), which shows any relation to 

 other mesozoic forms, and with the exception of the Solenhofen species of the abnormal 

 and widely different genus Pterinoblattina, it is very much larger than any other mes- 

 ozoic forms of this family. 



Finally a species from the Jura of Solenhofen is mentioned and rudely figured by 

 "VVeyenbergh (Period. ZooL, I, 86, PL ?>, fig. 12) under the name of Blattaria Dunclceri; 

 but all he says of it is that it is characterized by the abdominal appendages and the small 

 head. As far as the figure goes, there seems to be nothing to show that it is certainly 

 a cockroach, still less where it belongs; no wings are preserved. 



