18ti8.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. GG5 

 Lysiphlebus cucurbitaphidis n. sp. 



Female.— Length, 1 1111U . Black, smooth, polished ; antennae dark brown, 

 13-jointed, the 1st joint of the flagellum is slightly more than twice Longer 

 than thick, the following joints about twice as long as thick, the ter- 

 minal joint being longer; legs brown; the anterior and middle coxae 

 and all the trochanters yellowish, the posterior coxae and sometimes the 

 middle pair basally, black or brown-black ; abdomen dark brown, the 

 petiole very short, widened behind; wings hyaline, veins brown; the 

 radius is very angularly bent, the 2d branch being as long as the 1st. 

 The male has 15 jointed antennae, flagellar joints twice as long as thick, 

 the last not longer than the preceding. 



Habitat. — Lafayette, Indiana. 



Described from many specimens, labeled No. 3610 01 , reared by Mr. 

 F. M. Webster from Siphonophora cucurbitce Thomas. 



Lysiphlebus eragrostaphidis n. sp. 



Male and female. — Length, 2 mm . Black, smooth, polished ; legs pale 

 brownish-yellow, the posterior coxae black except at tip, the posterior 

 femora, tibia 1 , and tarsi dark brown, the tibiae at base yellowish ; the 

 basal joint of tarsi is not longer than the three following joints; meta- 

 thorax smooth, delicately areolated ; abdomen long, lanceolate, pointed 

 at apex, the petiole smooth, yellow, slightly widened posteriorly, the 

 following segments, except sometimes the base of the second, are dark 

 brown, shading into black towards apex, the 3d segment occasionally 

 has a pale spot laterally. Wings hyaline; the stigma and veins dark 

 brown. The female has 13-jointed antennae, the 1st joint of the flagel- 

 lum is hardly thrice as long as thick, the following joints slightly shorter, 

 the terminal joint being fusiform and twice as long as the preceding. 

 The male has 15-jointed antennas, the joints of the flagellum being about 

 twice as long as thick, fluted, the terminal joint pointed and longer than 

 the preceding ; the legs are usually darker than in the female; the an- 

 terior and middle pairs usually obfuscated along the upper surface, the 

 posterior pair being much darker, the middle and posterior coxa 1 , are 

 sometimes black basally, the apex brown ; the abdomen is long ovate, 

 the petiole yellow, the following segments dark reddish-brown. 



Habitat. — Lafayette, Indiana, and Los Angeles, California. 



Described from specimens received from Mr. F. M. Webster, labeled 

 '« Swept from Hragrostis, October 4, 1885 ;" and specimens received from 

 Mr. Coquillett, labeled No. 02, reared from an Aphis on Eragrostis; 

 and others labeled, "Parasite on Si})honophora sp. on Audibcrtia sto- 

 choides." 



Lysiphlebus Coquilletti n. sp. 



Male and female.— Length, 2 mm . Black, smooth, polished ; legs honey- 

 yellow, a dark streak along the upper surface of middle femora and 

 tibiae, the posterior eoxie black at base, their femora black or brown- 

 black, their tibia 1 , except at base and the tarsi, brown ; abdomen long 



