14 PROCEEDIKGS OF THE NATIONAL MUSEU:\I. vol.61. 



not compressed, as broad as long, second tergite occupying three- 

 fourths length, its hind margin and exposed parts of rest micro- 

 scropically coriaceous, hypopygium in balsam about .7 width of head, 

 ventral spine not longer than broad, ovipositor when dissected out 

 not 1.5 times length of antenna. Using width of head as a base, the 

 length of mesonotum ratio is 1.2, antenna 1.9, ovipositor 2.7, wing 3.5. 



Length of two pinned specimens each 2.4 mm. 



Type.—CdX. No. 6418, U.S.N.M. One cotype. 



Host. — Quei'cus hypoleuca Engelmann. 



Gall. — A few loosely connected, thin-walled wood}^ cells inside the 

 acorn. Found in summer in acorns of current season's crop. 



Habitat. — The type material was collected in Sabijio Basin in the 

 Santa Catalina Mountains, Arizona. June 28. 191S. Three living 

 adults were cut out December 2. 1919. Normal emergence is prob- 

 ably in the spring. Acorns similarly affected were seen in the 

 Huachuca Mountains also. 



CALLIRHYTIS FRUCTUOSA, new species. 



Plate 2, fig. n. 



Female. — Black, head and parts of legs often more or less reddish- 

 brown. Head linely rugose, as broad as thorax, seen from in 

 front elliptical with facial line .73 transfacial and interocular 

 area 1.25-1.4 times as broad as high ; broadened behind eyes, 

 thickness .42 width, ocellocular space equal to antennocular, malar 

 space .4 ej'e and with several parallel ridges, mandibles, 2- 

 toothed, palpi 5- and 3-segmented. antennae 12-segmented, first and 

 third subequal, fourth tliree-fourths third, 5-11 gradually shorter, 

 last two and three-eighths preceding. Pronotum rugose. Meso- 

 scutum longer than broad, finely rugose, parapsidal grooves oblit- 

 erated in front, their separation behind .24 width of head, anterior 

 and lateral lines distinctly raised into ridges, no median. Scutellum 

 more coarsely rugose, narrow transverse groove at base foveolate and 

 not limited laterally, often emarginate behind. Propodeum with 

 many ridges radiating from rugose peduncle, the usual carinae 

 strongly divergent above. Mesopleura finely pebbled with a few 

 parallel ridges across middle. Hind tarsus shorter than tibia, second 

 and fifth subequal. claAvs simple. Wings hyaline, subcosta and lirst 

 and second cross-veins yellowish, rest pale, short pubescent, margin 

 ciliate only on hind wing. Abdomen longer than l)road. slightly 

 compressed, smooth, shining, second segment occupying .4 length, 

 bare at base, its hind margin and exposed parts of rest finely punc- 

 tured, ventral spine not longer than broad, ovipositor wlien dissected 

 out about two-thirds length of antenna, ovarian eggs well developed. 

 Using width of head as a base the length of mesonotum ratio is 

 1.2-1.3, antenna 1.3-1.5. ovipositor 0.96-1.13. wing 3.14-3.30. 



