io6 ANNALS OF SCOTTISH NATURAL HISTORY 



HEMEROBIUS NERVOSUS, F. 10 examples, from loth May 

 to 3Oth June. These must almost certainly have 

 come from at or below the tree line. 



Div. PSEUDO-NEUROPTERA. 

 PERLID&. 



CHLOROPERLA GRAMMATICA, Poda. About a dozen in June. 

 ISOPTERYX TRIPUNCTATA, Sc. -More than a dozen in June. 



I. BURMEISTERI, Pict. ? Three examples in June possibly 

 belong here. 



T^ENIOPTERYX RlSl, Morton. Two examples may be re- 

 ferred to this species, which has quite recently been 

 separated from T. trifasciata, Pict., 26th May and 

 6th June. 



LEUCTRA, sp. ? Nearly 20 specimens of a small species 

 that it is inadvisable to refer to under any particular 

 name in the present uncertain condition of the genus. 

 End of May and beginning of June. One is indi- 

 cated as found alive on the snow. 



NEMOURA MEYERI, Pict. Two specimens presumably belong 

 here : they are in bad condition. 



EPHEMERID^E. 



RHITHROGENA SEMICOLORATA, C. Nearly 40 examples, 

 mostly in beginning of June. The habit of soaring, 

 mostly in swarms, so common in EpJiemeridtz, especi- 

 ally in the males, would render these insects especially 

 liable to be carried away by sudden inrushes of warm 

 air. But a certain small percentage of the individ- 

 uals are still in the sub-imago condition, and in that 

 state could not have voluntarily taken any lofty flight. 



SlPHLURUS, sfi.?? One example, 2nd June, may pertain 

 to this genus, but its condition precludes precise 

 definition. 



ODONATA. 



PYRRHOSOMA MINIUM, Harris. One male example, 5th 

 June. This is the only dragon-fly in the collection. 



