1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 617 



rimmed, the plate smooth; all the following segments arc smooth and 

 polished, the 2d with a dorsal black blotch occupying most of its surface, 

 leaving only the base and lateral margins yellow, the 3d, 4th, and 5th 

 dorsally entirely black, excepting the suture between the 3d and 4th ; 

 ovipositor, black. Wings hyaline, iridescent ; veins, pale brown, the 

 stigma darker; venation as in B. phycidis Riley. 



Habitat. — Alameda County, California. 



Described from one specimen, labeled No. 3815 x , and reared January 

 28, 188G, from a cecidoinyious gall on Mimulus glutinosus, taken in Ala- 

 meda County, California, by Mr. Albert Koebele. 

 Braccm diastatae n. sp. 



Female.— Length, 2 ,nm ; ovipositor, A mm . Brownish-yellow, smooth 

 and polished ; antennae twice the length of the whole insect, 36-jointed, 

 black, excepting the two basal joints, which are concolorous with the 

 body. Head large, transverse, as broad as the widest part of the 

 thorax; .parapsides not sharply defined, parallel ; an irregular impres- 

 sion on disk of mesopleura; metathorax very short, finely rugose; ab- 

 domen ovate, the plate on 1st segment large, narrowed at base, the 2d 

 with deep impressed lines extending from apical corners of 1st abdom- 

 inal plate; other segments smooth-; the very short ovipositor, black. 

 Wings grayish hyaline, veins brown. 



Described from one specimen, labeled No. 3205, and reared June 28, 

 1886, from a dipterous corn leaf miner, Diastata sp. 



Bracon gastroideae n. sp. 



Male. — Length, 3 mm . Head and thorax, smooth, polished, black ; an- 

 tennae longer than the whole insect, 30-jointed, black, excepting the 

 suture between the 2d and 3d joints; palpi black; head trausvere, as 

 broad as the thorax across from wing to wing; parapsidal grooves dis- 

 tinct, converging and almost meeting at base of scutelluin ; the latter 

 with the transverse groove at base, and separated from the mesothorax 

 by a slight ridge; mesopleura with two transverse, parallel grooves on 

 the disk; metathorax with median and lateral keels; legs yellowish-red, 

 tips of posterior tibiae and tarsi, dusky; the plate of the 1st abdominal 

 segment is oval, black, as well as the lateral grooves and keels, the 

 lateral margins yellow; a black blotch at base of 2d segment conform- 

 ing to the black plate of 1st segment. Wings, smoky hyaline; costae 

 and stigma, black, other veins clouded; the recurrent nervure is almost 

 interstitial, joining the 1st submarginal cell at it lower posterior an- 

 gle, the 1st transverse cubital vein oblique; the upper margin of 2d sub- 

 marginal, therefore, shorter than the lower. 



Described from a single specimen, labeled No. 329L 01 , reared June 

 7, 1880, from Gastroidea vyanea Mels. 



Bracon pissodis n. sp. 



Female.— Length, 3i mm ; ovipositor, 2f mm . Head and thorax, smooth, 

 polished, black; antennae about the length of the whole insect, 40- 





