DIPTERA. 289 



4. Face broad on the sides, produced thlipsomyzoides, Jaenn. 



Face of the usual structure alteram, sp. n. 



5. Mesonotum almost uniformly opaque yellowish- brown ; discal cell 



unusually large ; furcation of third vein beyond the base of the 



second posterior cell ; wings hyaline. (Length 3 millim.) . . . albida, Wiedem. 



Mesonotum distinctly striped, with yellow lateral margins .... 6. 



6. Abdomen with black and yellow bands 7. 



Abdomen not banded 8. 



7. Legs for the most part yellow cingulata, Loew. 



Legs for the most part black consors, O. S. 



8. Mesonotum with opaque black stripes ; wings hyaline. (Length 



3 millim.) pulchella, sp. n. 



Mesonotum with brownish stripes ; wings brownish sororia, sp. n. 



Phthiria consors (p. 155). 



To the locality given, add : — United States, New Mexico, Magdalene Mts. (Snow, 

 in Kans. Univ. Coll.). 



A number of specimens from the above locality agree with the description. They 

 are of especial interest, because they include the male, hitherto unknown. These are 

 deep black throughout (the sides of the venter only being yellow) ; the hair of the 

 head is black, and that of the thorax light yellow ; the wings are not brownish, as in 

 P. dolorosa. 



2. Phthiria similis. 



? Phthiria similis, Coquillett, Trans. Am. Ent. Soc. xii. p. 103 l . 



Hab. United States, Southern California l . — Mexico, Amula in Guerrero (H. H. 

 Smith). 



Two males from Guerrero, differing from Coquillett's description 1 in having the 

 proboscis a little longer, the third joint of the antennas of equal width throughout, 

 and the pile of the abdomen yellowish, not whitish. Possibly this is the male of 

 either P. cingulata, Loew, or of the following. 



3. Phthiria pulchella, sp. n. 



9 . Head yellow ; front with a median black stripe ; sides of the face above with a blackish spot, not very 

 distinct. Antenna?, proboscis, and palpi black. Mesonotum for the most part opaque velvety-black, the 

 sides narrowly, and the posterior part broadly, yellow ; in the middle with two slender yellow stripes, 

 pollinose anteriorly. Pleurae light yellow, the mesopleurse and pectus largely black. Abdomen uniformly 

 yellow or reddish-yellow. Legs, including the coxae, yellow ; distal part of the front femora blackish ; 

 all the tibia? for the greater part, and the tarsi wholly or for the greater part, blackish or black. Wings 

 nearly hyaline. Length 3 millim. 



Eab. Mexico, Amula in Guerrero (E. H. Smith). 



biol. centb.-amer., Dipt., June 1901. 2 p 



