178 MAINK AGRICULTUR.\L EXPERIMENT STATION. I912. 



Apterous viviparous female. Head, thorax and abdomen 

 black. Abdomen with white transverse pulverulent dorsal 

 patches, — a pair to each of 3 or 4 segments. Cauda black at 

 tip, brown at base. Cornicles black. 



Piipcu. Head and prothorax black,— lateral tubercles present. 

 Thorax pale to dusky. Abdomen black with white pulverulent 

 transverse dorsal patches, — about 3 pairs cephalad cornicles and 

 2 lines caudad cornicles. 



Structurally ApJiis cookii Essig (Essig 1911c) comes very 

 close to this species. 



. Fig. 298. A. rumicis. Antenna of alate viviparous female. 



Macrosiphum solanifolii Ashmead. Collection 85-08 taken 

 at Orono, Sept. 5, 1908, from stalk of Gladiolus comprised 

 alate and apterous females which I am unable to separate from 

 solanifolii from potato and take to be the same species. Col- 

 lection 20-05 taken from cultivated Iris July 6, TQ05 contained 

 apterous females and nymphs of this species. Bulletins No. 

 147 and No. 190 of this Station are devoted to solanifolii, a 

 species frequently troublesome in the large potato fields of 

 Maine and' in certain localities in Canada. 



Explanation of Aphid Wing Plate. 



Fig, 299 Lachnns cnrvipes, alate viviparous female ; Figs. 300 and 

 301, ly. curvipes, male ; Figs. 302 and 303 L. strobi ; Figs. 304 and 305 

 L. pini; Figs. 306 and 307 L. laricifex; Figs. 308 and 309 L. hyalinus ; 

 Fig. 310 Siphocoryne avense; Fig. 311 Aphis abbreviata; Figs. 312 and 

 313 A. rumicis; Fig. 314 Neoprociphilus attenuatus; Fig. 315 Rhopalosi- 

 phum nymphse. 



