104 THE CANADIAN ENTOMULOaiST. 



and the dark brown of femur wholly wanting. Abdomen with a long 

 slender petiole, very small and black and shining throughout. 

 Length, body .11, wing .13, antennae .11. 



C. GEMULA, n. sp. 



This species is a recent discovery of mine, having escaped detection 

 on account of its early appearance and minute size. The gall is found in 

 the centre of both the flowering and leal buds of Q. prbwides. It is 

 fully developed when the sterile flowers of this species of oak are in bloom. 

 Only one gall is found in a single bud. It is exactly like an ordinary acorn 

 in shape, having a truncate base and a cone-like extremity with a sharp 

 point at the apex. It is a dull blackish color, and only .10 of an inch in 

 length and .05 in diameter. It contains but one larva. When the gall 

 happens to be in a leaf bud it is often found at the summit of a young 

 branch one or two inches long, so rapid is the growth of the tree at this 

 season. In the flower buds it is often nearly hidden in the surrounding 

 bud scale.s. The insects appear in both sexes about the middle of May, 

 and may be described as follows : 



Female : Head black, finely rugose. Ocelli medium size, the anterior 

 one forming the vertex of a more than ordinarily obtuse triangle. Anten- 

 nae 14 joints; ist short, truncate; 2nd ovate and standing in the cup- 

 shaped summit of the first like an egg in an egg cujj ; 3rd short, though a 

 little longer than the first two taken together ; 4th a very little shorter than 

 the 3rd. Remaining ones sub-equal and of moderate length. In color 

 the I St and 2nd are a clear brownish -yellow, the rest a dull brown, growing 

 darker in the terminal joints. Thorax bright shining black. Parapsidal 

 grooves well defined ; no other lines or grooves. Scutellum finely rugose. 

 Fovae wanting, but there is a smooth narrow groove between the meso- 

 thorax and the scutellum. Legs a clear, uniform amber, ungues black. 

 Wings decidedly fuscous. Veins dark and well defined. Cubitus heaviest 

 in the lotver half. Areolet present, but very minute. Radial area open. 

 Radial vein heavy its entire length and slightly thickened at the end, which 

 does not quite reach the margin of the wing. Abdomen sub-pedicellate ; 

 I St segment very long, shining black, remaining segments in dry specimens 

 concealed in the first so completely as to make their study very difficult. 

 Sheath of the ovipositor very small, with a few microscopic hairs on the 

 dull yellowish brown tip. 



Length — body .08, wing .11, antennae .07. 



Male: Antennae 15 joints, the ist and 2nd a little darker than in the 



