DICRANOMYIA, 63 



pale yellow ; tips of the tarsi darker. Abdomen infuscated 

 above ; forceps pale. Wings nearly hyaline ; stigma elliptical, 

 pale ; veins pale brownish ; tip of the auxiliary vein nearly 

 opposite or a little before the origin of the praifurca ; the sub- 

 costal cross-vein is separated from the tip of the auxiliary vein 

 by a distance at least equal to the length of the stigma, if not 

 longer ; the cross-vein, forming the inner end of the discal cell, is 

 sti'aight ; discal cell always open. 



Hab. Washington ; Trenton Falls ; Maine. 



When I first described this species I had twenty-five specimens 

 for comparison. I), immodesta is not unlike the European D. 

 viodesta, the discal cell of which, however, is closed. 



3. I>. gladiator 0. S. % and 9- — Ochracea, fnscescens ; thoracis 

 vittis tiibus fuscis ; aiiteiinis fascis, basi pallidis, alis liyalinis, stigmate 

 iiifuscato ; areolS, discoidali apert^ ; vent's auxiliaris apex initio prre- 

 furcse i')his niinusve oppositus ; veuiila subcostalis transversa ab auxili- 

 aris apice stigmatis lougitudine remota. 



Brownish-ochraceous ; thorax with three brown stripes ; antennre brown, 

 pale at base ; wings hyaline, stigma infiiscated ; discal cell open ; the 

 tip of the auxiliary vein is nearly opposite the origin of the prgefurca ; 

 subcostal cross-vein removed from the tip of the auxiliary vein at a 

 distance equal to the length of the stigma. Long. corp. 0.25 — 0.3. 



Sy\. Dicranomyia gladiator 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 212. 



Rostrum pale ochraceous, front brownish-gray, palpi infuscated, 

 antcnnaj brown, pale at base. Thorax brownish ochraceous, with 

 three distinct brown stripes; the intermediate one extends over 

 the collare ; the lateral ones extend beyond the suture ; scutellum 

 and metathorax brownish in the middle ; mesosternum with two 

 large, round brow^n spots between the fore and middle coxfe and 

 several smaller, indistinct spots ; halteres pale at base ; knob 

 brown ; feet brown, coxas and base of femora pale ; tip of the 

 latter brown. Abdomen brown, posterior margins of the seg- 

 ments and the genitals paler; falciform appendages of the male 

 forceps very large (Tab. Ill, fig. 4) ; they are very striking in 

 the living insect, and when their points touch each other, they 

 form a kind of arch or bridge over both lobes. (The name of the 

 insect is derived from these sword-like appendages.) Wings 

 nearly hyaline ; stigma elliptical, more or less infuscated ; vena- 

 tion exactly like that of D. immodeda. 



