Insects. 



899 



The sloping declivities facing the north are covered with a thick 

 layer of guano, in some places several feet in depth, but of course 

 rendered inefficacious by the excessive moistness of the atmosphere. 

 It is in the crevices of these slopes that the greater number of the 

 birds build, nearly all the holes appearing to be more or less con- 

 nected ; and the sport of watching the old birds into their nests and 

 blocking them up with large stones, in order to observe where they 

 emerged, was most amusing, and proved very satisfactorily their sub- 

 terraneous connexion. 



However, my chief object having been to investigate the Coleoptera 

 of the island, I subjoin an entire list of my captures, inasmuch as 

 the non-appearance of several species which usually swarm every- 

 where, and nowhere more than they did on the opposite coast, is, 

 perhaps, more remarkable than the appearance of whatever in the 

 following catalogue may be considered of rarer occurrence. 



Graptodera oleracea 

 Thyamis apicalis (Waterh. 

 MS.) 



pusilla 

 Mantura Cbrysantbemi 

 Spheeroderma Cardui 

 Cbrysomela varians 



Banksii 

 Sarrotrium muticum 

 Helops striatus 

 Mycetocharus murina 

 Aleochara fuscipes 

 Astilbus canaliculars 

 Ocypus compressus 

 Quedius tristis 

 Philonthus aeratus 

 Cafius lateralis 

 Polystoma obscurella 

 Gyrohypnus linearis 

 Omalium rivulare 



Cicindela campestris 

 Olistophus rotundatus 

 Calathus melanocepbalus 

 Argutor erythropus 

 Amara trivialis 



convexior 

 Harpalus aneus 



limbatus 

 Notiophilus striatus 

 Haliplus lineato-collis 

 Hydroporus jug ularis (Bab.) 

 Colymbetes chalconotus 

 Helepborus grandis 



granularis 



griseus 

 Laccobius globosus 

 Cercyon ruficorne 



piceum 



fusceseens 

 Nitidula aestiva 

 Anisartbria minutissima ? 

 Atornaria fuscipes (Gyl.) 



Typhaeus vulgaris 

 Apbodius ater 

 Cetonia aurata 

 Dolopius marginatus 

 Lepidotus bolosericeus 

 Agrypnus murinus 

 Melanotus fulvipes 

 Aplotarsus baimorrboidalis 

 Telepborus testaceus ? 

 Ptilinus pectinicornis 

 Ceutorbynchus didymus 

 Nedyus assimilis 



contractus (var. ?) 

 Antbonomus ater 

 Sitona subaurata 



canina 

 Polydrusus cbrysomela 

 Apion curtirostre 



violaceum 



striatum 



Kirbii 



apricans 



To these I may add an apparently undescribed species of Hydro- 

 porus ; at all events I cannot refer it to any one hitherto recognised 

 as British : a singular variety of Nedyus contractus, with pale yellow 

 legs, taken in abundance from a species of Brassica, which grows in 

 profusion on the eastern side of the island : and also what I con- 

 ceive to be a new species of Macrocnema, allied to chrysocephala, 



