238 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



KEY TO DESCRIBED SPECIES. 8 



1. Spur on front tibia as long as metatarsus, twice as long as furcula. Middle tibia 



with distinct spur. Abdomen reaching far beyond apex of radial cell. No 



areolet .fossoria Weld, p. 240. 



Spur on front tibia one-fourth length of metatarsus, not longer than furcula, 

 No spur or middle tibia. Abdomen reaching only to base of radial cell. 

 Areolet present 2 



2. Thorax clear straw yellow. Females, 3.0-4.4 mm. Average of 23, 3.7 mm. Males 



3.4-3.75 mm. Average of 9, 3.6 mm treatae Mayr. p. 238. 



Thorax dark brown. Agamic females, 2.0-3.1 mm. Average of 47, 2.7 mm. 



kinseyi Weld, p. 241. 



35. BELONOCNEMA TREATAE Mayr. 



Dryorhizoxenus floridanus Ashmead Trans. Amer. Ent. Soc, vol. 9, 1881, Proc. 

 p. xxv; vol. 12, 1885, p. 293; vol. 13, 1886, p. 63. 



Belenocnema treatae Mayr Genera Gallenb. Cynip., 1881, p. 17; 20 Jahresber. 

 Com. Oberrealsch. I Bez. Wien, 1881, p. 17 note. — Dalla Torre, Cat. Hym., 

 vol. 2, 1893, p. 131. — Beutenmueller, Bull. Amer. Mus. Nat. Hist., vol. 26, 

 1909, p. 278, pi. 51, fig. 1.— Thompson, Cat. Amer. Ins. Galls, 1915, p. 5, 36 — 

 Felt, Key to Amer. Ins. Galls, N. Y. St. Mus., Bull. 200, 1918, p. 54, fig. 65, 1. 



Belonocnema treatae Mayr, Ashmead, Trans. Amer. Ent. Soc, vol. 14, p. 133. — 

 Cresson, Syn. Amer. Hym., p. 174. — Ashmead, in Packard 5th Rept. U. S. 

 Ent. Comm., p. 104. — Dalla Torre and Kieffer, Wytsman Gen. Ins. Cyni- 

 pidae, 1902, p. 80, No. 2; Das Tierreich, Lief. 24, 1910, p. 725. 



Belonocnema floridanus Ashmead Cresson, Syn. Amer. Hym., 1887, p. 174. 



The type galls of this species were found while ploughing under 

 a live oak (Qucrcus; virginiana Miller) in March. They were just 

 below the surface on the small rootlets (up to 10 mm. in diameter) 

 and in Clusters every 4 or 5 inches. They are described as irregular, 

 somewhat wedge-shaped, soft and fleshy, easily detached, of a yellow- 

 ish color, the first true root gall to be described in this country. Two 

 hundred flies were reared. The galls are still preserved in the United 

 States National Museum, black or brownish and very similar to the 

 dried galls of the sexual generation of Trigonaspis. 



The writer has never seen the fresh galls, but on two occasions 

 has found the dried-up galls of what was probably this species on the 

 roots of Quercus geminata Small, at St. Petersburg and Clearwater, 

 Florida, in November. In each case they were on the roots of sap- 

 lings whose leaves bore immense numbers of globular, tan-colored 

 galls, described in 1861 by Osten Sacken as Cynips g. virens. This 

 suggests that these pea galls on leaf might be the alternating gener- 

 ation of Belonocnema treatae, but further observations or experimental 

 evidence will be necessary to prove it. The type galls 7 in the United 

 States National Museum have a label in Doctor Ashmead's hand 

 " agamic female of B. treatae Mayr," showing that he had already 

 suspected this relationship. The writer also has reared adults 

 from these leaf-pea galls and they prove to be all females and to belong 



• For discussion of Belonocnema Colorado Gillette see p. 205. 



7 Three agamic flies from Jacksonville, Florida, also bear the same label. 



