1888.] PROCEEDINGS OP UNITED STATES NATIONAL MUSEUM. Go") 



CHELONUS Jurine. 

 Chelonus lavernae n. sp. 



Male.— Length, 3^ mm . Black, opaque, densely finely rugoso-punctate, 

 covered with a short, white, sericeous pile. The palpi are pale; an ten- 

 Be broken; scutellum sharply triangular; nietathorax short, abruptly 

 truncate behind, the face of the truncature slightly hollowed, the pos- 

 terior lateral angles prominent, subacute; abdomen about the length of 

 the thorax, convexly rounded off laterally and posteriorly; there is a 

 slight indication of lateral keels, for a short distance, basally; the legs 

 are black ; tbe tips of the anterior and middle femora, their tibiae and 

 tarsi, honey-yellow; posterior legs all black except tibiae basally. Wings 

 hyaline, the parastigma, the stigma, and radius, black or brownish- 

 black; other veins yellowish. 



Habitat. — Kirk wood, Missouri. 



Described from a single specimen labeled " Parasite on Lavema elois- 

 ella Clem., October 18, 1881," received from Miss M. E. Murtfeldt. 



Chelonus pallidus n. sp. 



Female. — Length, 3f mm . Head, antennae dorsum of mesonotum, post- 

 scutellum, posterior coxa? and apical tips of femora, and tips of tibia? 

 black ; scape of antenna?, beneath, mandibles except tips, palpi, collar, 

 pleura, scutellum, metathorax, and abdomen honey-yellow. The head 

 is transverse, finely punctate, delicately, transversely aciculated on oc- 

 ciput; thorax rugose, with distinct coarser rugosities on the disk of 

 mesonotum; metathorax rugose; there are two prominent, subacute 

 projections just above where the abdomen joins the thorax, and the 

 lateral posterior angles are very prominent. Wings hyaline; the stigma 

 and veins blackish. 



Habitat. — M ary 1 an d . 



Described from a single specimen, labeled No. 3372°, reared June 2, 

 1884, from a Chlorops on wheat, sent to the Department by Mr. A. H. 

 Carson, of Hernwood Farm, Church Hill, Queen Anne's County, Mary- 

 land. 



Chelonus nigripennis n. sp. 



Male. — Length, 2| mra . This is a short, stout, intensely black, opaque 

 species, with a coarse, dilated, reticulated punctuation on thorax, pleura, 

 and abdomen, the sculpture of the abdomen being, however, longi- 

 tudinally directed. The head is finely sculptured, coarser on face; 

 mandibles rufous, tips black; palpi dusky; antenna? 20-jointed; scutel- 

 lum coarsely rugoso-punctate; metathorax abruptly truncate behind, 

 the lateral posterior angles very prominent; the short dorsal surface 

 is medially keeled and there are some more or less distinct raised lines 

 laterally. The abdomen is well rounded posteriorly, bicarinate basally, 

 very rugose; from the hollow beneath, at the tip, project two hairy ap- 

 pendages. Wings blackish-fuscous; the costa?, stigma, and parastigma, 



