1885.] S. A. Hill — Observations of the Solar Thermometer. 23 



49. Machjirota punctulata, Signoret. 



Machcerota punctulata, Signoret, A. S. E. F. (5 Ser.), ix. p. xlix. (1879). 



Brownish yellow, with the middle of the frons, the abdomen above 

 (except the base), the feet (except the posterior tibiae), and the frontal 

 grooves, black ; several transverse black spots on the thorax which is very 

 finely punctured : metanotum brownish with two yellow, lateral, basal 

 spots, the tip and the process blackish : tegmina elongate, five-celled and 

 above the marginal two to three others smaller, very distinct : the hyaline 

 nervures are spotted with several brown dots. Long 4> millims. ^ . 



Reported from Silhat. 



Note. Cosmopsaltria ahdulla, Distant, noticed as No. 57 at page 226 of the 

 Journal for 1884 is the same as Cosmopsaltria spinosa, Fabricius, No. 59. The 

 Indian Museum possesses a specimen of Gosmoscarta siamensis, Batler, but the 

 locality being uncertain, it has not been entered here. 



III. — On Observations of the Solar Thermometer at Luchnow. — By 

 S. A. Hill, B. Sc, A. B. S. M., Meteorological Reporter North- 

 Western Provinces and Oudh. 



[Received 23rd March 1885 ;— Read 6th May 1885.] 



In the volume of this Journal for 1883,* I have discussed some 

 observations of solar radiation made at Allahabad with the ordinary 

 black-bulb maximum thermometer in vacuo. The conclusions drawn 

 from these were that the absorbing power of the atmosphere is depen- 

 dent upon the tension of aqueous vapour and the quantity of dust 

 suspended in the air, pure dry air being very diathermanous ; and that, 

 when allowance is made for the variations of aqueous vapour, the mean 

 results for the heating power of the sun during the years . 1876 — 1882 

 exhibit a very uniform and gradual variation, culminating in 1878 and 

 gradually decreasing afterwards, therefore presumably having an inverse 

 relation to the number of spots on the sun's surface. The resulting 

 variation is so regular in its character that, irrespective of its pointing to 

 a conclusion regarding the sun's heat which is the reverse of that gene- 



* Vol. H. Part ii. 



