6 SOUTH AMERICAN TIPULIDAE 



brown, obscurely tipped with yellow, tibiae and tarsi dark brown. Wings 

 whitish or subhyaUne with rather small to medium rounded brown spots on 

 the membrane arranged as in the figure, many of these markings being inter- 

 rupted ocelUform; these markings are clearest on the cephalic half of the wing, 

 more indistinct, pale grayish, in the caudal cells. Venation: (see plate II, 

 fig. 1) Sc ending at about one-third the length of Rs; Sc2 about one-third the 

 length of Sci; Rs long, angular at its origin; basal deflection of Cih before the 

 fork of M. 



Abdominal tergites light yellow, segment one with a broad brown patch 

 on the sides of the sclerite; segment two with a broad brown subbasal annulus; 

 remaining tergites with about the basal half dark brown, very conspicuous; 

 pleurites of the male hypopygium dark brownish black, the pleural lobes yel- 

 lowish, a little browned at the base; sternites mostly light yellow, the extreme 

 base of the segments obscurely brown, this occupying from the basal quarter 

 to one-half of the segment. 



In the female, the Ijrown bands on the abdominal sternites are subequal 

 in width and position to the tergal annuli so that the abdomen presents an 

 evenly striped appearance. 



Habitat. — Peru. Holotype, cf, Matucana, Peru, altitude 

 7788 feet, July 14, 1914. (Parish coll.) Allotype, 9, topo- 

 typic. Paratypes, 3 d", Jauja, Peru, altitude 11,878 feet, 

 June 23, 1914. (Parish coll.) 



In its spotted wings this insect suggests a number of Andean 

 species. Limnobia guttata Philippi ^ (now Dicranomyia chilensis 

 Alexander) is described as having 16-segmented antennae and 

 the thorax with a brown stripe; L. pohjsticta Philippi"^ (Chile) 

 has the spots on the wings very abundant and the thorax with 

 three darker stripes. D. muscosa Enderlein ^ (Ecuador) and 

 D. tricincta ^ Alexander (Peru) have a supernumerary cross-vein 

 in cell 7^3 of the wings. 



Dicranomyia gibbera sp. n. 



Antennae black; thorax brown or gray with a broad darker median stripe; 

 wings with a radial sector very short, about equal to the basal deflection of 

 Ri+b- 



Male. — Length, 4 to 5 mm.; wing, 5.1 to 5.5 mm. 



Female. — Length, 6 to 7 mm. ; wing, 7 mm. 



Rostrum, palpi and antennae black, the latter short with the segments 

 of the flagellum subglobular. Head with the front light gray, the vertex and 

 occiput grayish brown; a brownish blotch on the middle of the vertex in front. 



3 1865. gutiaia Phihppi, Verh. k.-k. zool.-bot. Ges. Wien, xv, p. 613. 

 1913. chilensis Alexander, Proc. U. S. Nat. Mus., xliv, p. 487. 

 * 1865. polyslida Philippi, Verh. k.-k. zool.-bot. Ges. Wien, xv, p. 613. 

 ' 1912. muscosa Enderlein, Zool. Jahrb., xxxii, pt. I, pp. 75, 76, fig. WiK 

 " 1913. tricincta Alexander, Ent. News, xxiv, p. 405. 



