Insects. 8247 



done, but at Plymouth, where I stayed nearly a week, " west country" weather prevailed 

 to such an extent that one is almost inclined lo believe the saying- current in ihe more 

 easterly parts ofthe county, that " it always rains at Plymoutb," an accusation, however, 

 which is indignantly denied by the inhabitants. For those species of Pbryganidae that 

 require the highly aerated water of running streams for their successful development 

 the boulder rivers of South Devon are particularly adapted. My attention as a Londoner 

 was especially turned to these rivers, and from that reason the species of Limnephilidee, 

 most of which breed in standing waters, are poorly represented in the list which follows. 

 It is possible from tlie comparative absence of suitable breeding places that these are 

 really not plentiful. The localities visited extend from Exeter to Plymouth, and so of 

 course include the various streams that have their origin on Dartmoor. The spot that 

 I found most productive was Shaugh Bridge, about a mile from.the Bickleigh station 

 CD the Tavistock Railway. Here two rushing torrents, known as the Rivers Meavy 

 and Cadworthy, unite amidst scenery of the most romantic nature. For the knowledge 

 of this and many other interesting localities 1 am indebted to the courtesy of my frieud 

 Mr. Reading'. The following is a list of the species taken : — 



Limnephilus Auricula, Curtis. Dawlish. 



L. costalis, Curtis. Abundant in a marshy spot on Dawlish Warren. 



Stenophylax striatus, Piclet. One specimen at Cornwood (River Yealm). Appa- 

 rently a scarce species everywhere. 



S. stellatus, Curtis. Dawlish. 



Halesus digitatus, Schranck. Dawlish and Shaugh Bridge. 



H. flavipennis, Pictet P Stephens. Moderately common by most streams. 



Sericostoma Spencii, Kirby. A few specimens. 



Mormonia hirta, Fabr. Common. 



M. irrorata, Curtis. Of this little species, which has hitherto been a great rarity 

 (not more than half-a-dozen specimens being in collections both here and on the Con- 

 tinent), 1 captured eight or nine. Ii evidently prefers spots where the water is very 

 shallow, and in two localities I found it among the damp moss about the sides of 

 quarries, where there were merely slight dripping springs. 



Hydroptila ? Very abundant at Dawlish, coming into the open windows in 



swarms. 



Odontocerus albicornis, Scopoli. Single specimens at Exmouth, Dawlish and Ivy- 

 bridge (River Erme). 



Leptocerus bifasciatus, Olivier, Pictet. This beautiful black, white-spotted species 

 was not uncommon at Dawlish, dancing about in small swarms over the surface at 

 mid-day. 



L. (Setodes) bicolor, Stephens. Bickleigh. 



Rhyacophila dorsalis, Curtis. Abundant by all running streams. At Tavistock, 

 where the waters of the Tavy are much polluted by mine water, this was the only spe- 

 cies that frequented the river side, though by a small stream that runs into it other 

 species were as common as elsewhere. 



R. munda, M^Lachlan. This species, which I first discovered last year at Shaugh 

 Bridge, was common at the same locality, and I also found it at Ivybridge and Corn- 

 wood. It probably frequents all the Dartmoor streams. All my specimens are males. 

 Possibly the female is so like that of R. dorsalis that they are confounded. 



Glossosoma fimbriata, Stephens. Generally common. 



Beroea i Dawlish. The small black insects in this genus are little understood. 



