GUESTS AND PARASITES OF HALICTUS. 21. 



Family CHALCiniD/E. 1 



Eupelmus rhizophelus Ashmead. 2 



This remarkable chalcidid with vestigial wings in the female 

 was seen rather commonly about the Halictus burrows. As it has 

 been previously bred from cynipid root galls by Mr. Ashmead, it 

 is no doubt an accidental visitor to the bee nests. 



Eupelmus Ashmeadii sp. nov. 



Female. -- Length, 3.5-4 mm., ovipositor 0.5 mm. Shining green 

 varied with ferruginous on the thorax and with luteous and black on the 

 abdomen. Head shining green, with a sparse white pubescence. Man- 

 dibles brown, black at the tips, palpi black. Antennae long, the scape 

 yellow, reaching to the ocelli, flagellum black, about once and one half 

 the head-height, last joint acutely pointed. Head less than twice as wide 

 as long, the space between the eyes above narrow, so that the lateral 

 ocelli are close to the eye-margin. Face rugoso-punctate with a median 

 carina extending from the clypeus to the insertion of the antennae. Pro- 

 thorax shining brown. Mesonotum very closely punctate, not at all shining, 

 brown in front and green behind, concave medially behind, on each side 

 of the depression it is raised and almost carinate, then slopes down to the 

 reflexed margin ; anteriorly it is raised to form a broad triangular tubercle. 

 Pleurae ferruginous except in front where they are green. Metanotum 

 golden, closely punctate, bilobed, sharply declivous, forming a right angle 

 with the mesonotum. Wings deeply infuscated, paler at base and slightly 

 so at apex, with a narrow cross band of white just before the stigmal vein. 

 Marginal vein equal to one third the length of the wing, stigmal vein 

 moderate, one half the length of the post-marginal. Abdomen shining 

 black, pale luteous on the basal third. Sheaths of the ovipositor bright 

 ferruginous, almost as long as the abdomen. Legs brown, darker on the 

 front and hind femora, tarsi yellowish except the tips. 



Described from three female specimens collected at Woods 

 Hole, Mass., July and August, 1902. 



This pretty species was associated with the much smaller 

 brachypterous species, Eitpclinns rliizopliclus Ashm., on the bur- 

 rows of Halictus pruinosus. It is named in honor of Mr. Wm. 

 H. Ashmead, who determined it as an undescribed species. 



Henicopygus subapterus Ashmead. 



We have seen' this species running actively about on the ground 

 among Halictus burrows at Austin, Texas. Like the species of 

 Eupelmus, it may be an accidental visitor. 



1 We are indebted to Mr. Wm. H. Ashmead for his kindness in determining the 

 species of Chalcididaj. 



2 For wing-neuration, see BIOL. BULL., 1903, p. 189, Fig. 7. 



