312 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 1 



fined to the two common and widely distributed species on the Hard 

 and Soft Maples, which are generally known as the Fusiform Maple 

 Gall Eriophyes acericola Garman, and the Bladder IMaple Gall, Erio- 

 phyes quadripes Shinier. Both of these are typical Phyllocoptes, and 

 for the sake of stability of nomenclature should hereafter be referred 

 to respectively as Phyllocoptes aceris-crumena Riley and Phyllocoptes 

 quadripes Shimer. 



Descriptions of the Hard and Soft Maple Gall Mites 



Previous desci'iptions of both these species are too meager to dis- 

 tinguish them from associated mites. They may be recognized by the 

 following more important characters : 



Phyllocoptes aceris-crumena Riley. 



Body broadest at the posterior margin of the thoracic shield, with the abdo- 

 men gently acuminate. The thoracic sliield is broad, with the lateral angles 

 and the anterior margin gently rounded. It does not project over the body. 

 The dorsal setae are short and are situated near the posterior margin of the 

 shield. The legs are of medium size and the feathered hair has four rays. 

 The thoracic setae ai'e all present. Tlie first pair are short and fine. The 

 second pair are of medium length, while the third pair are rather stout and 

 of medium length. 



The striae on dorsum of abdomen are coarse and number from 30 to 32, 

 while the striae on ventrum are much narrower, with fine punctuation in be- 

 tween, and are at)out 60 in number. The lateral and genital setae are short. 

 The caudal setae are long and stout. The accessory setae are wanting. The 

 first pair of ventral seta? are long; the second pair of ventral setae are short, 

 while the third pair are very long. The females measure about 170 microns 

 in length and about 60 microns in width. 



Phyllocoptes quadripes Shimer. 



The anterior portion of the body is wide with the abdomen rather abruptly 

 acuminate. The mites vary in color from white, with pinkish reflections, to a 

 salmon color for the adults and hibernating forms. The thoracic shield is 

 broad and is slightly wider than long. The lateral angles are gently rounded. 

 The anterior margin is gently rounded and slightly projecting, but does not 

 extend over head. The dorsal setae ai-e short and stout. They are broadly 

 separated and are situated on the posterior margin of the shield, projecting 

 over the first four striae of the abdomen. The rostrum is large and is broad 

 at the base. The sternum is slightly furcated. The fii'st pair of thoracic 

 setae are short; the second pair of thoracic setae are of medium length, while 

 the third pair are long. The legs are of medium lengtli and have the usual 

 spines. The feathered hair has four rays. The claw is a little longer than 

 the feathered hair and is slightly knobbed. The spine on segment three is 

 rather stout and reaches to the feathered hair. The epigjmium is of medium 

 size and bears on its lateral margins one pair of setae, which are short and 

 fine. The epiandrium is arched in shape. 



The abdomen has from 37 to 40 coarse striae on dorsum and from 60 to 65 

 fine striae on ventrum. The first pair of ventral setae are long and stout, and 

 reach to the base of the second pair of ventral setae. The second pair of 



