Insects. 5053 



Genus Amphibolus. 



1. A. atricapillus, Waterh. I introduce this species with some 

 hesitation. It is based upon a single example in the cabinet of Mr. 

 Davis, described by Mr. Waterhouse in Ent. Mag. vol. i. There is 

 some reason to fear that this single example is lost. Its reputed 

 locality was Hebden Bridge. 



Genus Hyde^ena. 



1. H. testacea, Cart. Battersea Fields ; nearEpping; Halifax. 

 I do not know of any recent examples of this species : it exists in 

 several of the old cabinets. 



2. H. riparia, Kug. One of the largest species of the genus. I 

 have taken it occasionally in Wales. Probably to be found more fre- 

 quently near London. 



3. H. nigrita, Germ. Four examples near Bettys-y-Coed, Sep- 

 tember, 1855; Dr. Power found it also in Northumberland. 



4. H. gracilis, Germ. Among the northern representatives of this 

 genus probably the most abundant. I have taken many thousands 

 in the mountain rills of North Wales ; the Rev. W. Hey found it in 

 profusion in Yorkshire. 



5. H. flavipes, Stur. I have never met with this beautiful little 

 species, but am indebted to Dr. Power for the examples in my cabi- 

 net, taken by him in the Wansbeck, near Wallington. 



6. H. pygma?a, Waterh. I found this species sparingly in North 

 Wales. Taken, according to Stephens, near London. 



The sexual dilatation of the palpi of this and the preceding spe- 

 cies deserves attention. I do not discover that the same obtains in 

 any of the former species of the genus. A single example of Hy- 

 drsena in Mr. Waterhouse's cabinet will probably prove to be a 

 seventh species. 



Before I leave this genus let me give one word of suggestion to 

 your readers who desire to obtain examples for themselves : patience. 

 There may be in the net one hundred examples, all, without a spe- 

 cial exercise of this entomological virtue, to be thrown aside with the 

 debris. First of all separate (with the net in the water), as far as 

 possible, all leaves, sticks, &c, by washing ; then spread out care- 

 fully the remainder, and watch. 



