Vol. Xxiii] ENTOMOLOGICAL NEWS. lOl 



A comparison of the eighteen Wister males shows that in 

 wing color they fall, with one exception, between Calvert's 

 figures I and 2, plate 3, Biol. Centr. Am. Neur. Figure i is 

 tricolor, figure 2 is titia. The exception noted is clearly titia 

 in wing markings (corresponding closely with fig. 5, loc. cit.) 

 and body markings. The Wister specimens are unquestion- 

 ably specifically identical, and I believe, supply the gap which 

 Dr. Calvert expected would be discovered, showing that "tri- 

 color is but the other extreme of the series in which H. bipar- 

 tita and H. titia are terms" (Biol. Centr. Am. Neur., p. 32). 



My conclusions are that in the United States one variable 

 species, hitherto known as Hctacrina titia and H. tricolor 

 exists ; that the northern examples are larger and paler col- 

 ored both as regards bodies and wnngs; that in any locality 

 within this area where the species occurs, specimens rep- 

 resenting the average forms of widely separated localities 

 may be taken; that a large series of specimens from a south- 

 ern locality will show more variation than a similar large 

 series of specimens from a more northern locality; and 

 that under these conditions it is useless to attempt to des- 

 ignate more than one entity by any device of nomenclature. 

 The species will be Hetaerina titia Drury. 



I have collected large numbers of both these nominal 

 species in Guatemala, but none of this material is available 

 for study at this time. I am sure, however, that specimens 

 of titia collected at Los Amates, in June, 1909, will show 

 a greater variation of wing" markings within the old defini- 

 tions of titia than the Wister specimens show within the 

 old definitions of the w'ings of tricolor. The Wister speci- 

 mens will show more variation, however, than series from 

 either Indiana or Pennsylvania. 



Rice Growing and Malaria. — Dr. C. P. Kennard traces the con- 

 nection between the annual increase of cases of human malaria and the 

 rice harvest in British Guiana to the increased opportunities for the 

 breeding of Anopheles larvae in the small pools of water left by drain- 

 ing the fields in order to cut the grain. {Journ. Royal Agric. and Corn- 

 merc. Sac. Brit. Guiana, Dec, 1911). 



