106 ENTOMOLOGICAL SOCIETY 



Currie, Dyar, Gill, Hopkins, Knab, Patten, Piper, Quaintance, 

 Schwarz, Stiles, and Ulke, members, and Messrs. Marcus Ben 

 jamin, C. E. Burden, and C. H. T. Townsend, visitors. 



Mr. Knab exhibited a number of photomicrographs of scales 

 from the wings of adult mosquitoes of different species, some 

 of the latter belonging to supposedly different genera. He 

 pointed out how unsatisfactory and inadequate is a classification 

 of genera based on these scale characters and mentioned some 

 of the errors which have been made by attempting to character 

 ize genera from these scales alone, without reference to the 

 larvse. As an example, Mansonia fascipes Coq. and Pneumacu- 

 lex signifer Coq. have larvse which appear identical, yet have 

 adults which can not be associated by scale characters. The 

 genus Grabhamia of Theobald is a composite genus made up 

 of unrelated species which happen to have similar scales. 

 Other instances of this kind were mentioned. 



Mr. Schwarz spoke of the importance of correctly-desig 

 nated type localities as an aid in the identification of species 

 the descriptions of which are inadequate. He then referred to 

 the difficulty he had experienced in designating intelligibly the 

 localities in which he had made collections with Mr. Barber the 

 past spring in the province of Alta Vera Paz, Guatemala, where 

 settlements are few and many of these consist merely of a few 

 temporary structures, and are not found on the map and have 

 no permanent standing. In cases of this kind good photo 

 graphs of the localities where collections have been made are 

 often of considerable value, as they show the character of the 

 locality, its topography, etc., which mere names of settlements 

 do not. Mr. Barber took a number of such photographs, 

 many of which are so Characteristic that if seen they would be 

 recognized by any one who had visited the localities. One of 

 these, exhibited by Mr. Schwarz, was of the hamlet of Cacao 

 (fig. 5), located at the foot of the cliff of the Thirteen Water 

 falls (Trece Aguas) at an altitude of about 900 feet above 

 sea level. This locality presents a most remarkable topo 

 graphic feature which probably has not its like anywhere else. 

 Mr. Caudell then called attention to the fact that Morse, in 

 a recent paper on Acrididse, had published photographs of some 



