13 



claimed with some of the fragments that the interpretation offered 

 is not open to question. Handlirsch's monumental work* has fre- 

 quently been referred to, and has proved itself invaluable, expecially 

 for the means of comparison with fossils from other parts of the 

 world. 



New generic and specific names have only been proposed when 

 the specimens were seen to be sufficiently well preserved to warrant 

 definite characterisation and classification, while a number of unde- 

 termined forms have been relegated to ' Insecta Incertse Sedis," 

 without being named. 



2. IPSWICH FOSSIL INSECTS. 



Order BLATTOIDEA. 

 Family MYLACRID^. 



Genus AUSTROMYLACRITES, gen. nov. 



Tegmen broadly oval, with numerous main veins diverging from 

 the base ; all the veins dichotomously branched at intervals ; no 

 cross-veins or interpolated sectors. 



TYPE : Austromylacrites latus, sp. nov. 



AUSTFOMYLACRITES LATUS, sp. nov. 

 Plate 2, fig. 1. 



A fragment showing the greater portion of the basal half of the 

 tegmen, carrying nine main veins, all branching dichotomously 

 at wide intervals'. The arrangement of the veins is very symmetrical 

 about the longitudinal axis of the wing, so that it is impossible to 

 determine with certainty which is the costal and which the anal 

 border. Venation well preserved and easily followed. 



MEASUREMENTS : Greatest length of fragment 11 mm., 

 greatest breadth 10 mm. 



TYPE : Spec. 8 (Plate 2, fig. 1). (B. D. Coll.) 



OBS. : The venation of this interesting fossil bears an exceed- 

 ingly close resemblance to that of the specimenf described and 

 figured by ScudderJ from the Upper Carboniferous of Mazon Creek, 



* Die Possilen Insekten. Leipzig, 1908. 

 t Not placed generically ; specific name Gurleyi, Scudder. 



t Revision of the American Fossil Cockroaches, with Descriptions of New Forms, by S.H.S., 

 p. 145, with 12 plates. Bull. 124, U. S. Geol. Surv. By Auth., Wash., 1895. 



B 



