PHILIP P. CALVERT 
220 
to occupy the position of a suiispecics of dilatalus into which it 
may grade geographically. Vastus in the north, from New York 
and Iowa to Pennsylvania and Tennessee (Miittkowski lt)10), 
therefore, represents dilatatus of the south, from Virginia to 
Florida, while lineatifrons, hitherto confused with dilatatus and 
with a range similar to (hut not, in present knowledge, identical 
with) that of vastus, is more distinct from the othei- two forms 
than they are from each other. 
Larvae 
Prof. Needham has also sent me three exuviae from Spring 
C'reek, Decatur C'ounty, (leorgia, June 7 to 23, 1911, collected 
l)y Prof. J. C. Bradley, labeled “Gomiihus dilatatus?.” A com- 
pai'ison of these with Hagi'u’s description-'’ of bi-ed exuviae of 
(fotiiphus vastus, ami with Prof. Needham’s description'' of a 
supiiosed (iotn ptiurus dilatatus skin from Indiana, whi(di, fi'om 
its locality is v('i-y probaldy that of liaeatif vans, gives thetollow- 
ing differences: 
Size: (lilatatiis ((Jeorgia), total leiistli, 117 to 40 miii., niaxinmin width of 
abdomen f segment six) 0 to 10 mm. ; en.s/a.s, leiis^tli dl mm.', Itut'dlifrons, 
ami 10 mm. 
Hairiness: <tit(it<UuR, hairs on sides of the In'ad, antennae, iemora and 
tibiae; ro.s/w.s', body . . . little hairy”; lincdiifronx, “but little hairy (‘Xceirt 
on the sides of the head, antennae and tibiae.” 
4'hird antennal joint: (tdalalns, twice as Ions as one and two (antennae 
lackino; in two of the three exuviae); vdstn.'t, “twict* the length ol the two 
basal”; liiicdtifrods, “thrice as long as the two first sc'gments together.” 
Median labial lobe: ilildldln.s, distal margin almost sti'aight or slightly 
convex, with a fringe of closeb'-sc't scales; I'listdis, “middle third ol front l)or- 
der straight, with longer comb of flat scales”; iinedtifrods, “median lobt' in 
front with a deep semicircular concavity, the sides of which are thiidy Iringed 
with flattened hairs or scales.” Figure 14, accom|)anving Frol. Xeedham’s 
desciijrtion, shows the form very clearly. 
Mid-dorsal abdominal hooks: dddfatus, on .segments eight and nine oidy; 
cu.sp/.v, “ on 8th to 9th, shf)i't tubercles,” lincdUfriddi, “very I’udimenI ary, 
on segments 7-9 oidy.” 
.\bdominal segment ten compared to nine: (Htdldtiis, variable, om'-third 
to (jiie-fourth a.-t long mid-dorsally ; ru.s/n.s-, “one-third of 9(h ; liticiilifrd/is, 
(not mentioned). 
Lateral s])ines of alxlominal s(‘gment niiu': dddfutus, variabh* in length 
relative to segnuud ten, always longcu- but in no case twice as long;' rd.dd.i, 
“as long as lOth”; Um’diijronx, “twice as long as the tenth. 
^ Trans. Amer. Fnt. Soc. xii, jj. 2t)d. LSS.a. 
® Bull. 68, X. York State Mus., p. 266. 190:!. 
TR.WXS. AM. ENT. SOC., XLVU. 
