NO. 2105. NEW SPECIES OP HYMENOFTERA—ROHWER. 215 



Table to the genera of the Cimbicini. 



Propodeum deeply emarginate posteriorly, the emargination without a chitinous cov- 

 ering; third anal vein in the liind wings present; posterior femora simple 1 



Propodeum hardly emarginate posteriorly; third anal vein in the hind wing wanting; 

 posterior femora toothed beneath; lab rum large, well exserted. . . Trichiosoina Leach. 



1 . Labrum small, not, or but scarcely, exserted Cimbex Olivier. 



Labrum large, well exserted Cimbicisoma , new genus. 



CIMBICISOMA, new genus. 



In most of the characters this genus is close to Cimhex, but the 

 large well exserted labrum allies it to TricMosoma, from which it may 

 be separated by the foregoing table. Antennae seven jointed, head 

 as in Cimbex, except the large labrum, which is as in TricMosoma, 

 legs and body as in Cimhex. 



Type.—Cimhicisoma dendrobii, new species. 



CIMBICISOMA DENDROBII, new species. 



This species has a superficial resemblance to Cimbex carinntula 

 Konow. 



Female. — Length 18 mm., length of the anterior wing 20 mm., 

 labrum shghtly broadening apically, anterior margin rounded, the 

 lateral margins with obtuse carinae, median area with a short well- 

 defined carina, shining without any punctures; anterior margin of the 

 clypeus very slightly arcuately ermaginate, the surface granular 

 opaque ; superclypeal foveae elongate, well defined ; superclypeal area 

 flat; head between the eyes op9,que, finely granular, laterally coria- 

 ceous with a few sparse setigious punctures; postocellar area narrow- 

 ing anteriorly, the cephal-caudal length slightly longer than the 

 posterior width, postocellar furrow obsolete; second and third joints 

 of the flagellum subequal in length, the apical joints not well dif- 

 ferentiated; anterior lateral margins of the pronotum tuberculate; 

 thorax opaque ; scutellum with a median longitudinal impressed line ; 

 second recurrent vein received by the second (first) cubital cell about 

 the length of the second transverse cubitus from its apex, transverse 

 radius joining the radius the length of the second transverse cubitus 

 beyond it; abdomen opaque, finely granular, apical segment slightly 

 emarginate medianly; sheath concealed. Ruf o-f erruginous ; spot on 

 the anterior margin of the prescutum, the sides and thorax beneath, 

 and first two abdominal segments, black; legs black, except the apices 

 of the femora, tibiae, and tarsi, which are the color of the body; 

 wings yellowish hyaline, the submedian, median, first discoidal, radial, 

 and the upper margin of all the cubital cells deeply infuscated, 

 posterior wings yellowish hyaline, venation yellowish brown. 



British Burmah. Described from one female which was bred by 

 the United States Department of Agriculture from a cocoon col- 

 lected on Dendrobium hardianum by George Field, the adult issuing 

 May 17, 1902. 



Type.—€sit. No. 18529, U.S.N.M. 



