210 Annals Entomological Society of America [Vol. XIII, 



side of the break. The first vein (vl) ends in the costa at about 

 the center of the anterior margin. The second vein (v2) ends 

 by a short, but distinct, curve forward in the costa near the tip 

 of the wing. The third vein (v3) ends at the tip of the wing with 

 a sUght curve forward, while the fourth vein, ends either straight 

 or with a slight convergence from the third vein. The anterior 

 cross (acrv) vein meets the margin of the discal cell (del) at the 

 distal third, and almost at right angles to the third vein. The 

 posterior cross vein (pcrv) is oblique, meeting the fifth vein 

 about one-fifth of the distance from the wing margin. The 

 second basal (bcl2) and anal (acl) cells are of equal size and 

 small. The alula (ala) is slightly smaller in the female wing than 

 in the male, but conspicuous in both sexes. 



At the base of the costal vein there are two scales (Figs. 13 

 and 14) which have been called the tegulae, or epaulets. These 

 lie over the base of the vein, the uppermost one being the 

 tegula or epaulet (ept) and the lower one the sub-tegula or sub- 

 epaulet (sept). These are of some use in the classification of 

 some flies and could probably be used in the Anthomyidae. 



The base of the first vein seems to be in three sections. The 

 first two of these have several small openings (Figs. 13 and 15). 

 According to Lowne, these openings, especially the group on 

 the remigium (rm), or first section of the vein, are the chordo- 

 notol organs, the same as are found more highly developed in 

 the haltere. Similar openings are also found on the auxiliary 

 vein, at the tip of the first vein, at the tip of the second vein, at 

 the tip of the fifth vein, and on the anterior cross vein (Fig. 13). 

 The membranous portion of the wing is covered with fine spines 

 as are also the veins. The border of the wing has a short fringe 

 ■of fine hairs. 



The squamee (Fig. 16) are two membranous scales located 

 at the base of and below the wings. When the wing is pulled 

 forward the two scales are plainly seen, the upper or antisquama 

 (sqa) being the anterior and the squama (sq) or lower one, the 

 posterior scale. In this species the antisquama is larger than 

 the squama and round, while the latter is roughly triangular. 

 There is a fringe of long fine yellow hair on each scale, which 

 seems to arise from a thickened border of the membrane. 

 (Fig. 18). 



The halteres or balancers are located on the metanotum and 

 .according to Lowne they are highly specialized organs of sense. 



