60 R. OSTEN SACKEN. 



of the 9 brownish-yellow, except the hind ones, which are infiiscatod, the base 

 and the tip only remaining yellow. Fore tarsi pale yellow; onj'chia brown ; 

 middle and hind tarsi with the first and even the second joint whitish ; the fol- 

 lowing joints j'ellow, the tip brown. Abdomen dark green, shining in the 

 male; brilliant green, in some places bluish, in 9 ; ovipositor as long as the 

 body without the head, or a little shorter. Wings hyaline. 



Reared from the large blackberry gall of Dkisfrnplius nehuIosu&, 

 0. S. Eleven 9 and one % specimens. Wasliington, D. C. 



Five specimens (two Sand three 9 ), apparently of this same spe- 

 cies, were communicated to me by Mr. Jacob Stauffer, Lancaster, Pa. 

 He bred them from the gall of Aspliondjjlla rudbeckfse conxpicua, 0. S. 

 The tibias of one of the males are a little paler ; otherwise, I do not 

 discover any differences. 



■i. C. tubicola. n. sp. — Green with bluisli reflections; thorax sericeous with 

 some very shallow, sparse, and indistinct impressions; feet black or greenish- 

 black ; tarsi whitish, tip black. % about 0,07 : 9 0-09 ; ovipositor about 0.1 of an 

 inch long. 



Head green, the sides of the face generally have a darker, bronze, eoloi'ing. 

 The face is sparsely, but rather distinctly punctured and clothed with soTne 

 scattered, short, whitish hairs; mouth yellowish-brown ; vertex bluish-green, 

 serieeoiis. Antennae black, scapus of the 9 yellowish. Thorax green, with a 

 very slight tinge of bluish, rendered sericeous by dense, microscopic trans- 

 verse striaj ; it is even except some indistinct, shallow, scattered impressions, 

 visible only in a certain light; a very sparse, short pubescence is also apparent. 

 Pleurae green, partly bright blue. Abdomen green, or bluish-green, bright, 

 shining. Ovipositor of the 9 about the length of the body. Hind coxre with a 

 distinct brownish, metallic tinge; their anterior part, however, generally green 

 or blue. Femora metallic green, except the very tip, which is yellowish. 

 Tibiffi; fore and middle ones brownish with a metallic reflection, excei)t at both 

 ends, which are yellow: this color is more extended on the fore tibite, espe- 

 cially in the 9- Hind tibise dark brown, somewhat lighter brown at the tip. 

 Tarsi whitish, black at tip. Wings hyaline. 



Reared from the galls of Ci/nips qnercus tubicola, three S and a sin- 

 gle 9 specimen. Washington, D. C. 



A good many species will be found closely allied to this, and, there- 

 fore, difficult to distinguish from it. I possess one male and two fe- 

 male specimens, apparently of the same npecies, perhaps a trifle larger, 

 which have been obtained from galls of Cijiilpa (jncrcm lann. 



A single specimen, obtained from C^iiij)^ q. siiit/nJaris, Bassett, be- 

 longs, evidently, to a different species. It is larger, gveen, with very 

 little bluish reflections, ovipositor considerably longer than the body, 

 anterior tibiai paler, etc. Another still larger specimen (source un- 

 known), is of a more brilliant green; all the tibias are yellow; the ovi- 

 positor likewise very long. 



