ART. 10 GALL-INHABITING CYNIPID WASPS WELD 81 



fleshy layer soon rots away leaving a hard, smooth, thin, brittle 

 shell. For rearing they should be kept out-of-doors on the ground 

 until spring. 



ANDRICUS ROBUSTUS. new species 



Female. — Black and red. In some the head and thorax are red, 

 infuscated on anterior and parallel lines, others show all stages of 

 coloration to black. Head punctate and pubescent except for bare 

 area just above antennae; seen from above transverse, massive, as 

 broad as thorax, cheeks strongly widened behind eyes ; from in front 

 broader than high, malar space .55 eye with striae on either side of 

 depressed clypeus, facial area 1.4 times as broad as high, antenna 

 14-segmented, lengths as (scape) 19(Avidth 7) : 8(6) : 22(5) : 18: 14: 

 12 : 9 : 8 : 8 : 7 (7) : 7 : 7 : 7 : 14 (G) . Thorax with the aspect of a Dischol- 

 caspis but parapsidal grooves are narrow, smooth and reach 

 nearly to pronotum and scutellum has two distinctly separated 

 small transverse pits at base. Mesoscutum coriaceous with uni- 

 formly distributed setigerous punctures, anterior and lateral lines 

 shining, no median. Scutellum rugose behind, disk finely punctate. 

 Carinae on propodeum nearly straight, slightly converging above. 

 Bare polished spot on mesopleura. Tarsal claws with tooth. Wing 

 hyaline, pubescent, ciliate, veins brown, second abscissa of radius 

 angled, areolet reaching one-fifth way to basal, cubitus faint, reach- 

 ing basal. Abdomen as long as head and thorax, length to height to 

 width as 88:39:30, its longest dimension (45) oblique to main axis 

 of body ; lengths of tergites along dorsal curvature as 83 : 27 : 19 : 

 15: 7: 17, second with pubescent patches at base, seventh pubescent, 

 ventral spine long and tapering, pubescent below, in side view eight 

 times as long as broad and placed at angle of 45° to axis of body. 

 Using width of head as a base the length of mesonotum ratio is 1.2, 

 antenna 2.4, ovipositor 4.4, wing 4.0. Length 3.0—4.1 mm. Average 

 of 64 specimens 3.51 mm. 



Type.— Cat. No. 27213, U.S.N.M. Type and 4 paratypes. Para- 

 types in American Museum, Field, Stanford, Harvard, Philadelphia 

 Academy, and with Beutenmueller. 



Host. — Quercus stellata. 



Gall (fig. 18). — A midrib cluster on under side of leaf in fall, 

 the galls dropping to the ground when mature. The individual 

 galls are somewhat globular, tapering to a pedicel at base and 

 pointed with a slight scar at apex, greenish and mottled with white 

 when fresh, turning brown during winter on ground. This is the 

 gall described in connection with the fly of Cynips vaceiniformiis 

 Beutenmueller which seems to have come from an accidentally in- 

 cluded gall of a different sort in the breeding cage. 



