Ci-IALOGCTE 01 MOTHS. 169 



HYDRILLA, Boisd. 



138. Hydrilla arcuosa, W. Y. Small Dotted Burr. 



Miana arcuosa. Staint. Man., vol. i., p. 213. 



Chortodes ,, Newm. Brit. Moths, p. 276. 



Hydrilla ,, Barr. Lep. Brit. Is., vol. v., 268. 



Caradrina „ Meyr. Hdbk. Brit. Lep., p. 121. 



Laeva. Buck., vol. iv. pi. Ixviii., lig. 6. 



Kot recorded everywhere, but all those who have taken it 

 report it as common and generally distributed, and I have no 

 doubt it occurs in all grassy places especially if rather damp. 

 The sexes differ considerably in size and were considered dis- 

 tinct species by Haworth. The female is considerably the 

 smaller of the two and was called Minima, under which name 

 it appears in the Twizell list. Mr. Fiulay records it as common 

 and generally distributed; Mr. Hedworth as "generally com- 

 mon, abundant at Thornley." Dr. Lees found it common in 

 Upper Teesdale, Mr. Sang at Seaton and Castle Eden, Mr. Back- 

 house at Darlington, Mr. Lofthouse at Greatham Salt Marsh. 

 It is not very common on the Hartlepool sand-hills, but is plen- 

 tiful about the denes, etc. 



STILBIA, Steph. 



139. Stilbia anomala, Haw. TnE Anomalous. 



Stilbia anomala. Staint. Man., vol. i., p. 314. 



„ „ Newm. Brit. Moths, p. 462. 



,, ,, Barr. Lep. Brit. Is., vol. v., p. 276. 



,, „ Meyr. Hdbk. Brit. Lep., p. 125. 



Larva. Buck., vol. vi., pi. civ., fig. 3 ; 0. Wils., pi. xl., 



fig. 12. 



Mr. Gardner took a single specimen of this rare species at 

 Black Hall Kocks. . It was flying in the bright sunlight in July. 



