10 PROCEEDINGS OF THE NATIONAL MUSEUM vol.68 



f uscated, antennae light yellow. Head coriaceous under lens, as broad 

 as thorax, scarcely enlarj^ed behind eyes, eyes not protuberant, face 

 slightly pubescent, malar space one-fourth eye with a groove, an- 

 tenna 13-segmented, lengths as (scape) 40:26:50:37:32:32:31:30: 

 28 : 27 : 25 : 24 : 34. Mesonotum length to width as 40 : 28, mesoscutum 

 about as broad as long, shining, microscopically coriaceous, without 

 parapsidal grooves, collapsible, with a few scattered short white 

 hairs. Disk of scutellum smooth, polished, with scattered hairs. No 

 carinae on propodeum. Tarsal claws weak, simple. Wing subhj'aline, 

 short-pubescent, ciliate, veins brown, first abscissa of radius angulate, 

 second nearly straight, areolet reaching one-fifth way to basal, would 

 be bisected by a perpendicular drawn through its anterior angle, cu- 

 bitus reaching basal near its lower end. Abdomen higher than long, 

 truncate behind, much compressed and distorted, ovipositor far ex- 

 serted. Ventral spine not as long as lobes of hypopygium. Using 

 width of head as a base the length of mesonotum ratio is 1.1, an- 

 tenna 2.5, ovipositor 4.1, wing 3.9. Length, 1.45-2.05 mm. Average 

 of 32 specimens, 1.72 mm. 



Male. — Thorax, legs and antennae light yellow, vertex and cheeks 

 infuscated, eyes black, abdomen back of petiole nearly black. Cheeks 

 not broadened behind the eyes, eyes slightly protuberant, antenna 

 14-segmented, lengths as (scape) 43:28:75:50:42:44:42:42:40: 

 39 : 37 : 35 : 33 : 37, second only slightly curved. Mesonotum length 

 to width as 54:34. Abdomen about as long as thorax, compressed 

 to a knife-edge above, lengths of tergites along dorsal margin as 

 (petiole) 7:21:12:10:9:9:10. Using width of head as a base 

 the length of mesonotum ratio is 1.3, antenna 3.2, wing 4.7. Length, 

 1.65-2.15 mm. Average of 24 specimens 1.91 mm. 



This is the first cynipid to be reported from Sadler's oak. The 

 species would go in the subgenus DoUchostrophus and is related to 

 Neuroterus wmhingtonensis Beutenmueller. 



Ty'pe.—C2it. No. 27181, U.S.N.M. Type female, allotype, 7 male 

 and 11 female paratypes. Paratypes at American Museum, Field, 

 Stanford, Harvard, Philadelphia Academy, and California Academy. 



Host. — Quercus sadleriana. 



Gall (fig. 28). — Greenish-yellow succulent enlargement of the mid- 

 rib and adjacent parencln-ma of the basal portions of the outermost 

 leaves in a terminal cluster and causing a more or less complete 

 reduction of the blade of the inner leaves in the cluster producing 

 a conspicuous rosette at the end of the twig. In July. 



Habitat. — The type material was collected July 20, 1922, on the 

 ridge above the Oregon Caves National Monument in the Siskiyou 

 mountains near Holland, Oreg., at an elevation of 6,000 feet. Adults 

 of both sexes emerged by July 28. 



