918 CHARLES PauL ALEXANDER 
23. 
24. 
26. 
27. 
28. 
29. 
30. 
dl. 
Large, wing of female 21.5 mm.; thoracic dorsum reddish brown with three velvety. 
brown stripes, the middle ‘one narrowly split by a line of the ground color; ground — 
color of wings yellowish and brown; basal abdominal tergites yellow without prominent | 
setigerous punctures; cross-vein r close to the tip of Ru. [Proe. Boston Soc. Nat. 
Hist., vol. 34, p. 126-127, pl. 16, fig. 18. 1909.] (Plate XX XIX, 140.)...Z. alleni Johns. 
Smaller, wing of female 20 mm.; thoracic dorsum gray with three narrow hee brown 
stripes, the middle one split by a broad pale line; ground color of wings hyaline: basal 
abdominal tergites gray with prominent setigerous punctures; cross-vein r more 
distant from the tip of Ri. [Journ. N. Y. Ent. ‘Soc., vol. 24, p. 118-120, pl. 8, fig. 2. 
OLGA] 5 CR abe meXOXC IONS ATO) SAN SON eg NS 2s ee L. marchandi Alex. 
R2+3 very elongated, nearly twice the length of R: alone; cross-vein r on R2+3. [Proe. 
Acad. Nat. Sci. Phila., p. 238, pl. 4, fig. 26. 1859.] (Plate XXXVIII, 127.) 
L. ultima O. 8. 
(L. ultima is included in both sections of couplet 12 because the character of the 
position of the cross-vein r is slightly variable and there is a possibility of mis- 
interpretation.) 
R2+s shorter, not longer than R, alone; cross-veinr on R2....................4---- a 
. Basal deflection of Cu: at the inner end of cell /st Mz. (Subgenus Dactylolabis O. 8.) .. 
Basal deflection of Cu near the middle of cell 1st Mz2............................. = 
Wings spotted with brown. [Proc. Acad. Nat. Sci. Phila., p. 240, pl. 3, figs. 28, 28a. 
ASSO OR a texas ASI oe Bee oes eater os) a ee bal be a L. montana O. 8. 
Wings unspotted. [Mon. Dipt. N. Amer., part 4, p. 229. 1869.] (Plate XL, 147.) 
L. cubitalis O. S. 
Wings spotted with brown or distinctly seamed along the cross-veins and deflections of 
VEINS ee Oe an ee SIN Ne A oN nt a 28 
Wings clear, or with only the stigmal spot (in L. poetica with a tiny cloud at the origin 
of{Rsijand-the basal deflection) of: J2s-125) 2)... ae ie eee 35 
Wings heavily irrorate with brown over the entire surface. [Proc. Boston Soc. Nat. Hist., 
vol. 34, p. 127-128, pl. 16, fig. 17. 1909.] (Plate XX XIX, 133.)....L. irrorata Johns. 
Wings not heavily irrorate over the entire surface, the markings appearing as broad 
seams to the veins or as dark tips to the wings............................200- 29 
R2+; short or very short, much less than R2z alone; ¢ross-vein r at about midlength of 
Re; petiole of cell M: longer than or subequal to this cell; brown seams to the veins 
more\ extensive; antennae of male short... 2.02... . 02.0) ane eee ee 30 
R2+s very long, subequal to Rz alone; cross-vein r just beyond the fork of R2+3; petiole 
of cell My distinctly shorter than this cell; brown seams on the wings limited to r-m 
- and the deflection of A.i+s; antennae of male elongated. [Mon. Dipt. N. Amer., 
part: 4, p) 2055 1869)]/-“ (Plate XOXOCV IMD 14s) a ee eae L. unica O. S, 
Radial sector short, arcuated to almost square at its origin; cross-vein r situated at 
[about midlength of vein R:, which is oblique; outer end of cell R2 very broad due 
to the oblique nature of vein R:; species with the cross-veins seamed with brown have 
the tip of the wings more or less infuscated. (Subgenus Phylidorea Bigot.)........d1 
Radial sector longer; vein R: not oblique and the cell R2 not strikingly broadened at 
its apex; broad grayish brown seams to the cross-veins, deflections of veins, and along 
Cu, but the wing apex only slightly darkened if at all........................... 33 
Coloration of the body yellowish or reddish, the thoracic notum light yellow. [Proc. 
Acad. Nat. Sci. Phila., p. 285. 1859.] (Plate XX XIX, 128.)........L. adusta O. 5. 
Coloration of the body dark brown to almost black, the thoracic netum con- 
COLOFOUSK .iai hee caer wap oan SS NRO dew wealloelle ofalsudlocd ole Ohl Ok Cae Ieee eee ee 32 
. Legs yellow with the brown apices to the segments narrow; costal cell of the wing yellow. 
[Psyche, vol. 18, p. 195-196, pl. 16, figs. 4, 8. 1911.] (Plate XXXIX, 129.) 
L. similis Alex. 
Legs with the femora brown, only a little brightened basally; costal cell of the wings 
brown. [Journ. N. Y. Ent. Soc., vol. 24, p. 123, pl. 8, fig. 7. 1916.] (Plate XX XIX, 
11 (0) Daeiaeeaee, MeO OER eal ee eae en erR PASE TM EE OTS MN ul dia\Y g +L, terrae-novae Alex. 
