188 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



This species bears much the same relation to castaneae that 

 walshii Mon., does to bella Walsh. It is distinguished princi- 

 pally by the greater length of the unguis of the sixth segment. 



Described from specimens in balsam mounts taken on Castanea 

 at Washington, D. C. 1900. 



Type Cat. no. 20210 U. S. Nat. Mus. 



Galaphis alni, n. sp. 



Alate viviparous female. Morphological characters: Antennae as fol- 

 lows: 1, 0.128 mm.; 11, 0.064 mm.; Ill, 0.88 mm.; IV, 0.672 mm.; V, 0.592 

 mm.; VI, (0.224mm. + 1.28mm.). Segment 111 is very faintly imbricated 

 and armed with very short stiff hairs much shorter than those on the 

 antenna of the other species. On its basal three-quarters the segment is 

 armed with about 14 circular sensoria in a row. The sensoria on the distal 

 extremity of V and on VI at the base of the unguis are elongate, that on 

 VI being 0.048 mm. long. The head is armed with several hairs which are 

 somewhat knobbed. Prothorax with similar hairs. Forewings 2.56 mm. 

 long and about 0.88 mm. wide. Veins distinct; radial sector absent; cor- 

 nicles 0.128 mm. long and about 0.112 mm. wide at base, distinctly tapering, 

 imbricated, anal plate not deeply cleft. Abdomen covered with capitate 

 hairs. 



Color characters: General color yellowish; antennae and tibiae dusky 

 or black wings with the cubitus and anal veins somewhat bordered with 

 black. The other veins and the stigma faintly bordered. Cornicles dusky. 

 Abdomen marked with black usually with a large black patch between 

 and in front of the cornicles. 



Apterous viviparous female. Morphological characters: Antennae as 

 follows: 1, 0.128 mm.; 11, 0.064 mm.; Ill, 0.672 mm.; IV, 0.368 mm.; V, 

 0.368 mm.; VI, (0.16 mm. + 0.96 mm.). Segment III, imbricated and 

 armed with 6 to 10 circular sensoria in a row. Head with prominent capi- 

 tate hairs, in fact the entire body is covered with these hairs; many of 

 which have a funnel shaped extremity. Cornicles as in the alate form. 

 Length from vertex to tip of abdomen 2.24 mm. Color characters: An- 

 tennae and tibiae dusky to black; body marked with black usually with 

 a blotch on the head, a band across the prothorax, a similar one caudadof 

 it and a band across the abdomen in front of the cornicles. The remainder 

 of the dorsum spotted with black. 



Described from specimens in balsam mounts taken by Mr. 

 Theo. Pergande on alder near Washington, D. C., 1899. 



Type Cat. No. 20211 U. S. Nat. Museum. 



Other specimens of males and oviparous females taken on the 

 same plant near Washington and at Vienna, Va. by the writer, 

 appear to be the same species. We are not describing them, 

 however, since they have not been taken in company with the 

 viviparous forms. 



