226 IOWA ACADEMY OP SCIENCES. 



The D. sorghiella of Forbes in all probability will be found 

 also in Iowa. 



Kermes galliformis Riley. 



The striking resemblance of these scales to the galls occur- 

 ring on oak leaves is sufficient to deceive the expert as well as 

 the uninitiated. Taken from oak, on the under surface of the 

 leaves and upon the twigs, at Ames. 



LECANIN.E. 



The members of this sub-family are with few exceptions per- 

 manently attached as adult females; the anal opening is cov- 

 ered with two small lobes, the scale is formed of a waxy secre- 

 tion and is not separated from the body, and the legs and 

 antennae are retained in the adults. 



Lecanium hesperidum. 



This widely distributed and abundant species is familiar to 

 all who keep oleanders, and it occurs also on a long list of 

 other plants, but mostly greenhouse species. Its greasy brown 

 oval scale is very conspicuous and cannot fail to attract atten- 

 tion. It is about three mm long. It is stated that the male 

 has never been found, although the species has been studied 

 from the time of Linnaeus down. 



Lecanium hemisphaericum Targioni. 



Another greenhouse pest occurring on oranges, palms, and 

 various plants. It is much more convex, approaching hemi- 

 spherical. It is about 3.5 mm. long and three wide. 



Lecanium olece Bernard. 



This species has been taken on Ficus and Naphitum litschii, in 

 the greenhouse at Ames. 



Pulvinaria innumerabilis Rathvon. 



This has been definitely recorded for a number of locali- 

 ties in Iowa, and it at times becomes so abundant as to prove 

 a veritable pest. The monograph of the species by J. Duncan 

 Putnam, of Davenport, is a most elaborate and valuable study 

 and the basis of much that is known concerning the habits and 

 life histories of these puzzling insects. 



Specimens referred to this species have been taken from 

 basswood the past summer. 



