Meteorological Observations. 319 



tation, fix themselves at will so as to undergo a final metamorphosis, 

 and they become Gamasi or Uropodi, from which they differ as much 

 at least as the swimming Hydrachni or Acari differ from their larvae ; 

 but these fix themselves by their mouth, and increase by sucking the 

 nutritive fluid of the insects of which they are the parasites. Ought 

 therefore the Ilypopi to be called larvae, when under this denomina- 

 tion have hitherto been comprised animals capable of nourishing 

 themselves by aliment derived from without, thus accumulating the 

 materials requisite for their ulterior transformations, so that in those 

 insects the metamorphosis of which is complete, the pupa takes no 

 further nutriment, and the perfect insect is sometimes in the same 

 case, as in Bombyx for example 1 Here, on the contrary, we have a 

 Hypopus provided with limbs like an active larva, but taking no nu- 

 triment : the Gamasi alone in their perfect state can feed and grow. 

 — Comptes RenduSy Feb. 5, 1850. 



METEOROLOGICAL OBSERVATIONS FOR FEB. 1850. 



Chiswick. — February 1. Densely clouded : showery. 2. Slight rain. 3. Cloudy: 

 clear. 4. Very fine. 5. Slight rain : very fine : showery. 6. Boisterous. 7. Fine. 

 8. Hazy. 9. Very boisterous. 10. Clear: very fine. 11. Rain: boisterous. 



12. Overcast: boisterous. " 13. Clear and dry: frosty at night. 14. Rain: 

 drizzlv. 15. Cloudy : rain. 16. Clear. 17. Overcast. 18. Cloudy : very fine. 

 19. Overcast. 20. Densely overcast : rain. 21. Overcast: clear at night. 

 22. Cloudy : very fine. 23. Overcast and fine. 24. Overcast. 25. Foggy. 

 26. Foggy : overcast : clear. 27. Foggy : very fine : clear. 28. Foggy. 



Mean temperature of the month 42°*80 



Mean temperature of Feb. 1849 41 -35 



Mean temperature of Feb. for the last twenty-three years. 39 '56 



Average amount of rain in Feh 161 inch. 



Boston. — Feb. I. Cloudy. 2 — 4. Fine. 5- Cloudy: stormy pjm. : distant 



lightning. 6. Cloudy : stormy a.m. 7. Fine. 8. Cloudy. 9. Fine : rain p.m. 



10. Fine. 11. Cloudy : rain a.m. and r.M. 12 Cloudy: rain and snow p.m. 



13. Fine : rain p.m. 14. Cloudy: rain a.m. 15. Fine. 16. Fine: rain a.m. 

 17. Fine. 18. Cloudy. 19. Fine. 20, 21. Cloudy. 22. Fine. 23—28. Cloudy. 



■dpplegarth Manse, Dumfries-shire. — Feb. 1. Heavy rain nearly all day. 2. Rain 

 all day : storm p.m. 3. Rain, wilh high wind. 4. Dull and cloudy. 5. Dull a.m. : 

 severe storm of wind and rain. 6. Hurricane, with heavy rain. 7. Snow -j%ths 

 of an inch deep: rain p.m. 8. Frost early : rain and wind p.m. 9. Rain and 

 high wind all day. 10. Fine: frost a.m. : showery p.m. 1 1. Snow : rain : wind. 

 12. Rather fine : slight shower. 13. Hard frost : clear and fine. 14. Rain thick 

 and close. 15. Rain ; stormy p.m. : very wet. 16. Showers: very changeable. 

 17, 18. Wet a.m : dull and moist all day. 19. Rain, and fog and wind. 20. 

 Showers, short but severe. 21. Rain : storm of wind. 22. Fair, but unsettled- 

 looking. 23. Fair : cloudy. 24. Fair and fine. 25. R lin during the night : 

 moist. 26. Fine a.m. : showery p.m. 27,28. Dull, but fair and mild. 



Mean temperature of the month 41°*7 



Mean temperature of Feb. 1849 41 *2 



Mean temperature of Feb. for the last twenty-eight years. 37 *6 

 Average amount of rain in Feb. for the last twenty years. 204 inches. 

 Sandwick Manse, Orkney. — Feh. 1. Cloudy: rain: cloudy. 2. Showers: 

 thunder : cloudy. 3. Showers 4. Sleet : cloudy. 5. Cloudy : sleet-showers. 

 6. Showers: clear: aurora. 7 Showers: clear. 8. Cloudy: frost : sleet-showers. 

 9. Snow-showers. 10. Bright : snow-showers. 1 1. Cloudy : clear. 12. Bright: 

 snow- showers : aurora. 13. Snow-showers : cloudy : aurora. 14. Rain : drizzle. 

 15. Cloudy : hazy : aurora. 16. Sleet-showers: hazy. 17. Rain : drizzle. 18. 

 Hazy: drizzle. 19. Rain: hazy: cloudy. 20,21. Sleet-showers: showers. 

 22. Cloudy: showers. 23. Cloudy: hazy. 24. Drizzle : fine. 25. Cloudy: 

 fine. 26. Clear : fine. 27. Drizzle : cloudy. 28. Cloudy : fine. 



