230 IOWA ACADEMY OP SCIENCES. 



laterad mesal lobe, two laterad first incision, two just laterad of second 

 incision, and one about one-third the distance from the second incision to 

 penultimate segment, and several smaller plates irregularly placed on anal 

 margin; edges of penultimate and antepenultimate segments usually pro- 

 vided each with a spine-like plate; ventral-grouped glands, cephalolateral 

 about seven, caudolaterals three or four, median none. 



This species is closely allied to A. ancylus Putn., but differs 

 in the character ot the scale, the median lobes are narrower 

 and more produced and lack the well defined inner notch, and 

 ihe number of the ventral glands is different. In ancylus the 

 inner thickening of the first incision is decidedly larger than 

 the outer, in marked contrast to the nearly equal thickenings 

 of osborni. Described from sixteen females and numerous 

 scales collected from white oak at Ames, Iowa. 



Aspidiotus Juglans-regioe Comst. 



This species is common in more southern localities and has 

 been observed in Iowa for the first time during the present 

 season. It was received from Alton, Sioux county, where it 

 occurred in great abundance on currant bushes and was thought 

 possibly to be the San Jose. It was introduced from Texas, 

 but evidently thrives in its present habitat. It may easily prove 

 a serious pest, but has never been considered as approaching 

 perniciosus in destructiveness. It is a much larger species than 

 jjerniciosHS, the scale being about three mm. in diameter, so 

 that it may be easily recognized without microscopical examina- 

 tion even. 



Aspidiotus nerii Bouche. 



A very common and at times a very destructive species, but 

 fortunately not spreading to any extent upon native plants. It 

 is particularly inimical to the Oleander and it is not uncommon 

 to see these plants completely encrusted with the white circu- 

 lar scales. I have received specimens from Des Moines and it 

 has been taken on Cycas revoluta in the greenhouse at Ames. 



AsjJidiotus Jicns Riley Mss. 



On Ficus unica, and Ficus sp in the greenhouse at Ames. A 

 very similar species, if not identical with this, also occurs on 

 Daphne odorata, but on account of their being parasitized, good 

 specimens for determination were not available. 



Aspidiotus rapax Comst. 



This species occurs on Osmanthus and other plants in the 

 greenhouse at Ames. This species is abundant and destructive 



