PHILIP P. CALVERT 
223 
0. Lateral margins of tlie dark brown mid-dorsal t lioraeie stri])o: in diln- 
Idliis (Plate XIV, tig. Id) diverging strongly e(‘i)lialad (from Ld to l.d:! mm. 
cf, 1.7 to 2.22 mm. 9, i)osteriorly to 2.1)() to d.ll mm. cf, d.dd mm. 9, aide- 
riorly)!; in lineal if rona (Plate XIV, fig. 11 J snijparallel or but slightly divei’g- 
ing cejjhalad (from I.IS to l.t)2 mm. 1.7 to l.Xd mm. 9, l)osteriorly (o 
1.70 to 2.0 mm. cf, 2.07 to 2.1') mm. 9, anteriorly). 
7. Width of the first pale given antehumeral stripi' compared to tlu' width 
of the adjoining half of (,he dark brown mid-dor.sal stripe at mid-heighf ; 
ill ililataliis two-thirds to sube(|iial (cf) ,.<)7 (9); in linealifrans 1.18-2. (o"), 
1.2 (9). 
8. Width of the second pah' green antehumeral strijie compared to the 
width of the dark brown st.ripe immediat('l\' jireceding it at, mid-height: in 
ililalalu.s .d-.07 (cf), .•l-.02r) ( 9), and not interrujitedjin /f/icn/f/’ro//,s. 2-.d;! and 
more often interrupt, ed lU'ar its upjier end, or obliterated in its upper t, Idl'd 
or fourth liy fusion of the brown anteliuni(>ral and humeral stripes (cf), .l.'i- 
.22 and not interrupted (('xeept in oni' Weaver 9 and on the left side only 
of t.lie Jellico 9 . 
!). Black strijieon t he obsoh'te first lateral thoracic suture: in ililafat not 
interrupted (e.xcept. in 'Pliaxter’s cf); in lineaUfruna distinctly iiiterrnptcd in 
its uiiper half (except in two of the four '’rippecanoe d' &)■ 
10. Pale markings on the mid-dorsum of abdominal segment seven reach- 
ing from the anterior end: in ililataliis to three-fifths (cf), four-fifths (9), 
of the segment’s length, pale green or gri'enisli yellow; in lineatifrons to one- 
half (cf), two-thirds or three-fourths (9), of the .segment’s length, bright 
yellow in both sexes (excej)t in one W'eaver 9, in which they are greenish 
yellow, and jiale grei'ii in the Jellico 9 )■ 
11. Exjianded lateral margins of abdominal segment eight: in dilalal aft 
rnori' convex, in lineatifrons less convex (cf. Plate X\', figs. 1, 2). 
12. Aidcnodals on the front wings: in dilatatas 12 to 15, 18 most fre(]uent 
(1 cf, 2 9); in lineatifrons 18 to 19, Hi and 14 most freiiuent (8cf 5 9)." 
18. Antenodals on the hind wings; in dilaUdas 9 to 19, eiiually frequent 
(4cf 2 9); in lineatifrons 9 to 18, 10 most frequent (8cf 5 9). 
14. Size: dilatalas, abdomen cf,4() to 52, average of four 49.5; 9, 47 to 
52, average of two (Rambur’s tyjie, teslc Selys, and Spring Creek 9) 49.5; 
hind wing cf,34 to 40, average 37.75; 9,40 to 48, average 41.5 mm.; linetdi- 
frons, abdomen cf,4G to 50, average of eight 48.5; 9,40 to 52, average of tivi' 
48.0; hind wing cf, 39 to 41, average 89.0; 9 , 40 to 45, average 42.5 mm. 
Of dilatalas only the males from Mrs. Slosson and from Johnson’s Is- 
land and the two females were measurcil, but no striking difference thi'ie- 
from was noted in the two males in the Museum of Comparative Zoology. 
.Ml of the eight males andtw'o females of lineatifrons not in the Museum ot 
Comjiarative Zoology were measure !. All these measurements are byeye- 
piece micrometer in a Zeiss binocular, oc. 4, obj. F. 55. 
^ In the Minnesota male of lineatifrons the discoidal triangle ol both Iront 
wings is two-celled; in all the other mati'rial whii'h I havi' (>xamined, ol bolh 
northern and southern forms, this triangle is free. Kcilieott meidions oni' 
male [of lineatifrons] “in which the triangles are all one crossi'd’’ (Odon. 
( )hio, p. 57). 
TK.VNS. AM. ENT. .SOC., XLVII. 
