TRICHOPTERA. IN DORSET. 107 



occurs in May and June at Iford ; fulvipes, Curt., rather particularly 

 known as a Dorset insect, in May, June, and July, at East Stoke, 

 Iford and Bockhampton ; angustipennis, Curt., from May to Sep- 

 tember, is abundant at Winfrith and Iford ; guttata, Pict., from 

 May to August, is very common at Winfrith, Iford and Moreton ; 

 the males often dance in groups in sunshine near the Frome, like 

 those of angustipennis. H. lepida, Pict., is abundant at East Stoke 

 mill in July and August. Wormaldia subnigra, McLach. (females 

 only), occurs in August and September at Studland Heath, near a 

 heathland spring, and at Morden at the outfall of the Park lake. 

 Chimarrha marginata, Linn., is very common on moss-grown boul- 

 ders, hatches and such objects in May, June and July on the swifter 

 reaches of the Frome at Moreton. Plectrocnemia conspersa, Curt., 

 occurs at Morden in May by the rushing outfall and stream from 

 Morden Park lake. It tends to that golden spotted appearance so 

 common in caddis-flies frequenting swift streams, cataracts over 

 boulders, and places where light and shade and spray make such 

 colouring harmonise with the surroundings. Polycentropusflavomaeu- 

 latus, Pict., found at Morden, Moreton and Bockhampton, is ex- 

 tremely abundant from May to September. P. multiguttatus, Curt., 

 though also a stream-frequenting insect, is common on the Morden 

 Park lake, but less so than the last. Here also the pond-breeding 

 Holocentropus dubius, Eamb., occurs in May and June, and at 

 East Lulworth lake, as does, more rarely, H. picicornis, Steph. 

 Cyrnus trimacidatus, Curt., abounds at Morden Park lake and at 

 Holme in May, June and July. Tinodes waeneri, Linn., is ubiquitous 

 on all our rivers and ponds as at the Corfe River, Morden, East 

 Lulworth, Winfrith, Moreton, etc., from May to September. Lype 

 phaeopa, Steph., is often met with, as at Moreton and Morden from 

 May to September, in the slower flowing waters, as is, not rarely, 

 Psychomyia pusilla, Fab., at Moreton and Iford from May to 

 September. Rhyacophila dorsalis, Curt., is general on all our streams 

 from May to October, even breeding in the small Winfrith brook, 

 whence the imago flies indoors to light. But the species of Rhya- 

 cophila are usually most at home glancing and flying in the roar, 

 rush and sparkle of tumbling waters amid precipice and peak ! 

 Agapetus fuscipes, Curt., is very common on the Frome system at 

 Moreton, Stafford and Bockhampton from May to September. 

 I have A. comatus, Pict., from Moreton in May, but it is much 

 scarcer than the preceding. 



The foregoing will give a total of 73 species found in the Wareham 

 district. C. W. Dale's British list, revised by K. C. Morton in L907, 

 gave 174 British species. Dale's Glanvilles AVootton list gives 12 

 species, of which 9 are not in my list: Phryganea minor, Curt., 

 Grammotaulms atomarius, Fab., LimnopMlus vittatas, Fab., Chaefo- 

 pteryx villosa,Silo pallipes, ¥ab.,Leptocerus bilimatm, Linn., Mysta- 



