ART. 10 GALL-INHABITING CYNIPID WASPS WELD HI 



Determined as this species the Museum has flies from Silver City, 

 N. Mex., reared February, 1881; Las Cruces, N. Mex., Fort Grant, 

 Ariz., reared April 19, 1882, all from twig swellings on oak. Also 

 flies from gall of Andricus durangensis Beutenmueller, Durango, 

 Mexico, reared March 1, 1897. 



SAPHONECRUS SERRATUS, new species 



Female. — Black, legs, antennae, mandibles, and tegulae reddish- 

 brown. Head from above broad as thorax, median length .35 

 width, occiput concave, cheeks not enlarged behind the eyes, not 

 margined; from in front broader than high, interocular line .5 trans- 

 facial, malar space as long as eye, without groove, whole face cov- 

 ered with fine ridges radiating from clypeus but partially obscured 

 by white pubescence, parallel vertical ridges on vertex above an- 

 tennae on each side of median ocellus, antennae filiform, 14-segmented, 

 lengths as (scape) U (width 6) : 7(5) : 16(3.5) : U: 14: 14: 13: 12: 

 11 : 10: 10: 9: 9: l.'^i(3.5), maxillary palpus 5- and labial 3-segmented. 

 Pronotum "broad" as in all the guest flies, median length one-fourth 

 that on lateral margin, somewhat truncate in front with two small 

 pits, emarginate behind, sides coarsely punctate. Mesoscutum 

 broader than long, traversed by sharp transverse interrupted ridges 

 which are higher on anterior third, parapsidal grooves are indicated 

 in the coarse sculpture and in certain positions a median is indicated 

 posteriorly. Scutellum subtruncate and coarsely rugose, slightly 

 margined behind, with parallel longitudinal ridges in transverse 

 groove at base. Carinae on propodeum straight, diverging above, en- 

 closing a smooth area broader than high, a prominent ridge on each 

 side also laterad of the spiracle. Mesopleurae entirely longitudinally 

 striata. Hind tarsus shorter than tibia, segments as 37 : 10 : 7 : 6 : 15 

 (including claw). Claws simple. Hind tibia with the two usual 

 apical ventral spurs and a shorter dorsal one. Fore wing pubescent 

 and ciliate, radial cell open on margin and partially so at base and 

 apex, cubitus reaching basal at its lower end, no areolet, anal vein 

 clouded as far as the usual break. Abdomen shorter than head and 

 thorax, length to height to width as 27 : 22 : 14, second tergite one- 

 fourth as long as third much as in Ceroptres but the two grown to- 

 gether without a visible suture (determined b}' dissection and balsam 

 mount), the comljined plate occupying the whole of the abdomen in 

 side view, its hind margin distinctly punctate, base almost bare; 

 petiole short, longitudinally sulcate as in Sy7iergui<, ventral valves 

 scarcely protruding, venti-al spine in side view twice as long as 

 broad. Using width of head as a base the length of mesonotum ratio 

 is 1.1, antenna 2.3, wing 3.4, ovipositor ;).3. Range in length 2.4-3.4 

 mm. Average of 18 specimens 2.8 mm. 



