290 



NOTES — DESMIDS AND ENTOMOLOGY. 



day with the great height at which the basaUic dyke appears on the 

 slopes of Roseberry, compared with its insignificant appearance on 

 the great plain of the Tees. Now we know that a vast glacier from the 

 Pennines joined the ice moving southwards along the East Coast of 

 England at Tees mouth, bringing with it its load of shap-granite, 

 which is found on the coast from Saltburn to Flamborough, and what 

 more likely than that this ice-stream tore up the basaltic dyke, 

 which might then have existed as a wall above the surrounding 

 country, owing to its hardness and consequent resistance to ordinary 

 denudation, and so supplied the large masses of Whinstone which 

 are such a remarkable feature in the list of Flamborough boulders. 



NOTE— DESMIDS. 

 Desmids of Gormire Lake.— Correction of Error.— In my note 



on the Desmidiece of Gormire Lake in the September issue, I mp.de a rather absurd 

 mistake — therefore, for Docidiiim tritncaium var. 7 read D. nodidosnni var. 7. 

 However, on looking over some old sketches during the past week, I find a very 

 similar variety of D. triincatiiui which I propose to call D. trujicatmn var. nov. 7 

 emarginatum. In this the notched ends are quite as strongly developed as in the 

 former case, and tend still further to show the close relationship between Tetine- 

 morus and the non-verticillate Docidia. The variety is Canadian in habitat ; and 

 in the slide the normal form of D. triincatiivi does not appear. — W. Barwei.l 

 Turner, Leeds, September 6th, 1887. 



NOTES— ENTOMGLOG K 



Acronycta alni and other Moths near Scarborough. — On 



June 25th a fine specimen of Acj-onyda alni was captured in the neighbourhood 

 of Seamer Beacon near Scarborough by Mr. J. Head. Flusia inte?-rogationis has 

 this season been fairly abundant on the moors, also Hepialus velleda on Oliver's 

 Mount. — J. H. RowNTREE, Scarborough, August 27th, 1887. 



Coleophora obtusella in Lincolnshire. — At the end of August, 

 Mr. J. Eardley Mason, of Alford, sent me larvae of this species, which he had 

 found feeding commonly on seeds of rush near the sea-shore at Chapel, near 

 Alford. It is only a recent addition to the British fauna, and as I believe it has 

 hitherto only been found on the south coast, Mr. Mason's discovery is most 

 interesting. — Geo. T. Porritt, Huddersfield, September 15th, 1887. 



Sirex jnvencus near Harrogate.— At the end of August, Mr. Riley 



Fortune sent me for determination an exceedingly fine female specimen of Sirex 

 jiivenciis which had just been found ' on growing grain ' near Harrogate. Its 

 commoner relative Sirex gigas is of not unfrequent occurrence, and I have re- 

 peatedly had it brought to me as a ' curious creature ' from this district ; but I 

 only remember seeing one previous specimen oi juvefiacs in the county, which was 

 many years ago brought to me, I think from one of the streets of Huddersfield. — 

 Geo. T. Porritt, Huddersfield, September 7th, 1887. 



Hemerobins concinnus at York.— I took a fine specimen of this 

 good neuropteron, the largest European species in the genus, at Warthill, near 

 York, on July i8th last. Mr, G. C. Dennis and I were returning from a very 

 successful day's collecting at Sandburn, when I found the specimen on a fir-trunk 

 in the wood near Warthill railway station. Had time permitted of a more 

 extended search probably more would have been secured. — Geo. T. Porritt, 



Huddersfield, September 7th, 1887. 



Naturalist, 



