A NEW OAK GALL FROM MEXICO 133 



in seminator but these are hairy to the base ; the wall is more woody 

 and thicker instead of a mere shell. See figures C and D. 



This is probably the same gal! coUected by Silvestri at Jalapa, Mexico, 

 in 1 908 and described by Trotter under the name " ? Callirhytis sp." in 

 Boll. Laboro. Zool. Portici 5:127, Tav. I, figs. 7-8, 1910 ; Marcellia 

 10:55, Tav. I, figs. 7-8. 1911. 



Callirhytis furnessae, new species. (PI. IV, figs. 1-7.) 



Female: Length, 3.2— 3.8 mm. Robust. Body uniformly rich brown. 

 Head as broad as thorax, finely rugose, covered with scattered white 

 hairs, more prominent below antennae and on mandibles and occiput. 

 Labrum distinctly impressed. Palpi honey-yellow, labial 2-jointed, max- 

 illary 5 -jointed. Antennas arising on level with middle of compound 

 eyes, 1 4-jointed, reaching about to middle of ajadomen, first two joints 

 stout and honey-yellow, the rest darker, third long and slender and then 

 successively shorter to the thirteenth, fourteenth about twice as long as 

 penultimate and acuminate. Whole thorax hairy except dorsal part of 

 mesonotum. Pronotum longitudinally ridged laterally. Mesopleurae 

 shagreened and less hairy. Mesonotum with a pebbled surface, becom- 

 ing rugose at margin. Parapsidal furrows complete. Two smoothish 

 lines from pronotum back about halfway and between them in place of 

 a median furrow the surface is slightly rugose, becoming a distinct furrow 

 close to scutellum. Two broad, stili smoother, and almost shining lines 

 extend forward between the parapsides and bases of the wings. Scutel- 

 lum coarsely rugose and hairy with two banana-shaped confluent foveae 

 at base, separated from sutural groove in front by a narrow ridge. A 

 V-shaped impression above hind wing, hairy, and so are lateral impressions 

 in metathorax and so is the medism segment except for an impressed area 

 above petiole. Legs light brown with all coxae and empodia infuscated 

 and the tibiae and tarsi of hind pair. Wings hyaline, ciliated, pubescent. 

 Subcosta, first and second abscissa of radius, basal, and vein at distal 

 margin of aieolet heavy, others lighter. Radial cell open. Abdomen 

 finely pebbled except the anterior part of second segment, which is smooth 

 and hairy. Rest bare, except a few hairs on last segment about the 

 sheath and a dozen or so long ones on ventral spine. 



Types of this and the following with Am. Ent. Soc. ; paratype galls, 

 flies, and photograph of the type gall are deposited in the following col- 

 lections : U. S. Nat. Mus. ; Harvard Mus. Comp. Anat. ; Field Mus. ; 

 British Mus. ; Cornell Univ. ; Wm. Beutenmiiller ; and L. H. Weld. 



