1020.] Ot}l 



tlie \-') provinces of the country. The l;in<?tiape dillR'nlt}- will no doubt sfimo- 

 what limit the use of the book by English students, unless they happen to 

 Iniow soniethinfr "f the vernacular in which it is written ; but even to such as 

 do not, nMi:-h of the information stnnds i'nii'ly well revealed by reason of the 

 similarity between many of the Key-words and the corresponding terms in 

 English or German. 



As regards nomenclature the nuthor takes a middle position. lie has 

 retained the old family names Lygneidae and Capsidae, while giving also the 

 modern equivalents 3I>/odockidae and Miridae advocated by the extremists, 

 and this plan, which is followed tliroughout, should enable any student 

 1o find his way successfully amongst the synonyins of other authors. To 

 English students, familiar only with the British Catalogue, the most 

 startling generic change will be Cimex for Pentatotna (ru/ipes). This use 

 of Cimex necessitates employing Acanthin for the bed-bug and its congeners 

 and AcantJiiidne for the family containing them, leaving Cimicidae as the sub- 

 stitute for Pentntomidae, while Salda and Saldidae ai-e left in the undisturbed 

 possession of the shore-bugs. Amongst the Capsidae, Leptopterna is retained in 

 its long-established sense, the suggested change to Miris being indicated as 

 above. T/it/reocoris, as usual nowatlays, is included in the Cydnidae. 



The Heteropterous Fauna of Finland, including Lapland, amounts to 

 414 species, based upon specimens In the Museum of the Universitv at 

 Helsinofors, and the author notifies those cases in which the types are con- 

 tained in the same collection. The corresponding British Fauna comprises 

 about 470 species, and a few remarks by way of comparison between the two 

 may be not uninteresting, seeing that the areas concerned are not verv unequal, 

 though Finland lies about 10° further north than the British Isles. About 290 

 species are common to the two faunas. One of the most striking peculiarities is 

 the great number of species of Aradus in Finland — 17 as against the meagre 3 

 of the British list; this points to a preponderance of forest-land in the foreign 

 country. Again, 24 species of Salda as against the British 19 are evidence of 

 the marshy ground and the very numerous lakes that occupy so much of Fin- . 

 land. These lakes, however, are not nearly so productive of Corixidae, as 

 might have been expected, and the British Isles easily overtop the Finnish list 

 by 30 to 22 ; it is curious to note that all the species with non-rastrate hemi- 

 elytra are absent from Finland. The British Ilemipterist, again, would be 

 surprised at the entire absence of some of his most familiar species, such as 

 Podojjs, Gnalhoconiis albomaryinatus, Piezodonts, Acanthosoma haemorrhuidale , 

 Ischnorhynchis geminatiis, Notochilus contractus, Nabis lativentris, Tripldeps 

 majuscula and minuta, Miris laeviyatus, Phytocoris varipes, Dieyj)hus epilobii 

 Midi stachydis, Heterotoma meriopfera, Naucoris, Plea, and many others. And 

 lastly, many ditlereuces will be noted in the plants with which the insects 

 are associated, for example, Metatrnpis rufescens, which with us is confijied to 

 Circaea lutetiana^ occurs in Finland on Linnaea horealis, and Circaea is not 

 mentioned at all ; and, again, Triphleps niyra, which in Britain is most com- 

 monly associated with heath, is referred in Finland to Artemisia and 

 Chenopodiu))i. 



Of the numerous biological problems connected with the Ileteroptora, the 

 author seems to have been most interested in tho.se that have to do with 

 distribution. The larva of one species only is described, — E, A. B. 



