204 Journal New York Entomological Society. [Voi. iv. 



CECIDOMYIID^. 



Cecidomyia neomexicana, sp. nov.'^^ 



$ . Length 3 mm. Dark slate grey. Sutures of abdominal segments reddish 

 two longitudinal hairy bands on thorax ; abdomen hairy. Halteres dull white. 

 Antennas 2-f-i2 jcinted, very dark grey, sometimes pale; legs grey, paler. Wings 

 greyish, venation normal; vii (following Comstock's nomenclature) very weak; fold 

 representing v distinct, iii 2J-5 reaching margin a little above tip of wing; lower 

 margin with a fringe of hairs. Antennal joints elongate, cylindrical, not moniliform 

 with sparse whorls of short hairs ; joint 3 much longer than 4. Pupa-shell red-brown* 



Galls numerous, many together, on twigs of Atriplex canescens ; globular, 8 to 

 12 mm. diam., yellowish-white. Composed of loose felted hairs, so that the outside 

 is soft, wool-like in appearance, yielding to pressure. The cell within is green, not 

 at all woody. Flies issued from September 30 to October i. 



Habitat: Organ, N. M., 5100 ft. Also common on Tularosa 

 Creek. The fly resembles C. atriplicis, Twns., but the gall is quite 

 different. Prof. Townsend has known the galls of C. neofiiexicana for 

 several years, but had failed to obtain the fly. 



APID.^. 

 Perdita townsendi, sp. nov. 



9. Length about 7.5 mm., shining, fairly pubescent. Head dark prussian 

 green, area between clypeus and antennae black. Vertex, occiput and cheeks with 

 conspicuous white pubescence, sides or front also pubescent. Front minutely granu- 

 lar, with sparse small punctures. Clypeus, sparsely but distinctly punctured, moder- 

 ately high, rounded at top, notched. Eyes very dark brown. Clypeus except 

 the usual black dots, lateral face-marks, two spots representing supraclypeal marks^ 

 scape except a black streak at and above, and basal half of iriandibles, prim- 

 rose yellow. Lateral face-marks shaped almost exactly as in P. rectmigulata, but 

 separated from clypeus by a black line, and the narrowing about level with 

 the lower part of the antennal sockets, the linear upward extension very short. 

 Flagellum dark sepia brown above, yellow beneath. Thorax with moderately 

 dense white pubescence, shining dark greenish-blue or bluish-green, the 

 mesothorax more green, the metathorax more blue. Mesothorax smooth, sparsely 

 punctured ; metathorax minutely granular, or rather tessellate. Tubercles and hind 

 boi'der of prothorax narrowly, very pale yellow. Tegulos hyaline with a yellow basal 

 mark. Wings milky-hyaline. Stigma and nervures colorless. Marginal cell with 

 the poststigmatel portion slightly the longer. Second submarginal large, narrowed 

 about half to marginal. Third discoidal distinct. Legs primrose yellow ; patch on 

 anterior and middle tibife behind, and hind tibioe except extreme base, black. Small 

 joints of hind tarsi darkened. Abdomen broad and flat, very pale yellow, with con- 

 tinuous brown-black bands, occupying the adjacent apices and bases of segments, 

 1-2, 2-3, 3-4, and 4-5, the first two of these four bands being broader than the 

 others. Segment i has also its base black, leaving only a rather narrow transverse 



* Mr. Coquillett refers C. neomexicana to Asphondylis, where I suppose C. 

 atriplicis should also go. T. D. A. C. 



