chiefly Umbelliferae, growing over a small area of Hogley 

 Bog, Cowley, near Oxford. The first-named sawfly was far 

 less perfect as a model than the other two, the last-named 

 being the most perfect. 



Entomological-Meteorological Kecords. — Major H. C. 

 GuNTON exhibited a diagram referring to Macrolepidoptera 

 of the 1919 season in order to suggest a graphical method of 

 recording observations of the appearance and habits of insects 

 in relation to weather conditions. 



On a sheet of squared tracing cloth (each square having 

 sides one-tenth of an inch) the names of the species of insects 

 are tabulated vertically on the left-hand side in the order 

 in which they appeared on the wing, w^hile along the top and 

 bottom the dates are written, so that there is one horizontal 

 row of squiares for each species and one vertical row for each 

 date. By means of difierent symbols representing sallow, 

 sugar, ivy, light, " settled " and " in flight," the circum- 

 stances in which each observation is made are recorded in 

 the appropriate square. 



The lower portion of the same sheet is devoted to par- 

 ticulars of the weather for each day, plotted to convenient 

 scales and including rainfall, humidity, barometer, maximum 

 and minimum temperature, direction and strength of wind, 

 and general character of weather, using the same conventions 

 as those employed by the Meteorological Office. The quarters 

 •of the moon are also indicated. 



It is claimed that systematic records plotted in this manner 

 have the following advantages : — 



(1) The species on the wing throughout the year, the order 

 of appearance and the rate at which they successively appear, 

 the length of existence in the perfect state, and the occurrence 

 of two or more broods in certain cases can be seen at a glance. 



(2) The simultaneous appearance on the wing of different 

 species of butterfly occurring at the same time in any locality 

 is largely a matter of a reasonably warm day and sunshine, 

 but in the cases of the moths there is a much more subtle 

 combination of conditions which occasionally produces extra- 

 ordinary results. The diagram facilitates the study of these 

 -conditions; for example, it recorded in the most compact 



PROC. ENT. SOC. LOND., I, II, 1920. C 



