334 PROCEEDiyOS OF THE XATIOXAL MVSEVM. vol.44. 



Front dark brown, black apically and with a nan"ow median stripe ; 

 vertex browii \vith a black U-shaped mark between the eyes; occiput 

 and gense bro\vn. 



Cervical sclerites prominent, transverse, deep velvety black on the 

 dorsal mid Ihie, grayish brown laterally. 



Thorax. — Pronotum, the scutum projects on the dorsal surface of 

 the insect, the scutellum is not visible from above, dark brown, paler 

 on the sides. Mesonotum, praescutum gray, the extreme mid line nar- 

 rowly black; on either side of this, extending from the cephalic 

 margin of the sclerite backward to the transverse suture where they 

 become confluent, a broad chestnut stripe; laterad of this, near the 

 middle of the sclerite, a broad brownish-chestnut stripe runs back- 

 waril, interrupted by the shallow, open, transverse suture. Scutum 

 light brown mesially, caused by the spreading out of the central 

 prseacutal stripes; on the sides of the sclerite are the well-defined 



/St A 



Fig. 3.— Winb of Tanyderis patagonicts. Sci, euboosta 1; Bi, BAorus I; Ks, radhs 5; 3t,, media 1 



CUl, COBITCS 1; Ut A, ANAL. 



continuations of the brownish-chestnut lateral prsescutal stripes; 

 scutellum and post-notum rich brown; metanotum dull brown. 

 Pleune, si)iracles prominent, spongy in appearance, yellow; epi- 

 pleuraj gray, sternal region more brown. Ilaltcres brown, stem 

 slightly paler. Legs, coxa), and trochanters" dull gray; femora rich 

 brown; ilark brown at tlio tip; tibia extreme base and tip brown, 

 remainder yellow; tarsi dark brown. 



iri?i<7s.— Venation, Sc long, its tip nearer the fork of 7?,+, than to 

 the fork of 7?^ + 5 ; a spur at the fork of Sc; a slight spur at the origin 

 of Rr^; an oblique supernumerary cross vein in cell R^; a second one 

 in cell 7?5. Anal angle of the wing not especially prominent. 



Wings (ilg. 3) subhyaline, veins brown; cells C and Sc yellow; 

 wings imirkod with gray and brown as follows: Brown; a rounded 

 spot at the base of tiie wing under the cross vein h; a second at the 

 origm of /?,; a third under the tip of Sc; a large irregular spot ex- 

 tending along the cord which is on the proximal half of the wing; a 



