196 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.58. 



One female, Wellington, Kansas, E. G. Kelly. 

 Type.— €sit. No. 20837, U.S.N.M., the female on a tag, a hind leg 

 and a fore wing on a slide. 



EMERSONELLA FUSCIPENNIS, new species. 



Female. — Similar to the genotype but the abdomen is more de- 

 pressed and bears a short petiole, the lateral carina is a little more 

 mesad, only the cephalic tibia is entirely pale, the fore wing is dusky 

 to apex from the distal half of the marginal vein, the hind wings are 

 lighth/ dusky, the mandibles are 4-dentate, the club is subequal to 

 each of the other flagellar joints (excluding pedicel), not distinctly 

 longer, the funicle joints a half longer than wide. Also, the pronotum 

 is distinct. Head finely sculptured beneath the antennae. 



One female, Turrialba, Costa Rica (Schild and Burgdorf). 



Type.— C&t. No. 20838, U.S.N.M., the thorax on a tag, the head, a 

 pair of wings, and a hind leg on a slide. 



ACHRYSOCHAEIS CAMILLI, new species. 



Female. — Length, 0.85 mm. 



Agrees with the description of (Derostenus) Aclirysocliaris fullowayi 

 (Crawford) but the fore wings bear a distinct substigmal cross-stripe 

 and the proximal two thirds of the scape is pale. Mandibles tri- 

 dentate. Flagellar joints more or less subquadrate. Densely, finely 

 punctate (glazed). Parapsidal furrows complete. Postmarginal 

 vein shorter than the stigmal, the margmal fringes very short. Ring- 

 joint very short. 



Five females reared from an Agromyza on alfalfa, Elkpoint, South 

 Dakota, July 27, 1916, C. N. Ainslie. 



Types.— Q&t. No. 20826, U.S.N.M. The females on a tag and a 

 slide. 



Mr. Gahan has identified these specimens as fullowayi of Hawaii 

 but because of the differences pointed out and the different localities, 

 it is wiser, I think, to keep the two separate. But I have only seen 

 the description of fullowayi not the iY\)Q. It should have a con- 

 colorous scape and a substigmal spot. 



RHICNOPELTOMYIA MARYLANDI, new specie? 



Female. — Length, 1.00 mm. 



Differs from 7narylanclei<sis in that there is but the suostigmal spot 

 on the fore wing, the postmarginal vein is subequal to the stigmal, 

 the coxae are metallic except at apex and the hind femur so laterad 

 between base and middle but not along the margins; the mandibles 

 bear larger teeth, are bidentate onl}^, the first tooth largest. From 

 Achrysocharoides in having the third ring-jomt large, the two funicle 

 joints are twice longer than wide, longer tba^^ the pedicel, the club 



