569 
Pubi. 5. vii . 1927. PRORIFRONS. By Dr. M. Draudt. 
figures to identify the species rather surely, so that on this basis the progress of this extraordinarily difficult 
genus will be facilitated. 
Type: P. quadrilineata B. & McD. 
I. Sect. Transverse lines not undulatingly dentate. 
P. lineata Maass. (76 c) has comparatively broad forewings with a slightly oblique, rounded distal Uneata. 
margin and an obtuser apex than the other species, ground-colour darker, browner, very coarsely strewn with 
greyish-yellow, the median area narrow, its distal border-line forming below the costal margin an almost right, 
somewhat rounded angle; the subterminal area is not darker than the postmedian area, only the marginal area 
is feebly darkened, the row of the subterminal lunae forming a coherent light line twice projecting distally. 
The costal margin of the hindwing is hardly concave, 2 lighter transverse bands are distinctly prominent. The 
abdomen is relatively shorter than in the similar species. Colombia, Ecuador, Bolivia. — It seems very doubtful 
whether quadrilineata B. & McD. is specifically different. The name may be maintained at the most for the quadrili- 
northernmore specimens appearing somewhat more olive brown owing to the intenser grey admixture, the neat a. 
median area being usually somewhat darker. The hindwings are of almost the same colouring as the forewings, 
in lineata of a decidedly redder tint. Described from Mexico. 
P. antonia Schs. (76 b) is very similar, smaller, dark red-brown, just as coarsely strewn with yellowish, antonia. 
distally lighter veins, lines as in lineata, though in the specimens at hand and in the figure of the type kindly 
put at our disposal by Mr. Schaus the distal border of the median area forms a larger rounded bow below 
the costal margin. Hindwing violettish-brown. Costa Rica. 
P. castullux Dyar (76 e) has decidedly narrower wings, with a much narrower distal margin, the colour castullux. 
being a darker ol ve-brown, often almost blackish; less coarsely strewn, more smoothly scaled; lines more 
oblique than in lineata, the median area hardly darker, the black anal spots variable, often almost absent, the 
upper spot much farther inwards than in lineata. Panama to Colombia. — As bamesi /. nov. (76 e) I denote barnesi. 
a much smaller lighter form with a prominently darkened median area which is narrower towards the hind- 
margin. The costal margin of the hind-margin is much deeper concave. Mexico. Type in the Coll. Draudt. 
P. doeri Schs. (= boliviana Dogn.) (77 a, 86 b) has still longer and narrower wings than the two prece- doeri. 
ding species, with a very oblique distal margin, the costal margin being very convex towards the apex, so that 
the apex of the wing is somewhat falciform. Deep red-brown, with feeble yellowish veins, almost straight and 
very oblique transverse lines, the median area being at the costal margin 3 to 4 times as broad as at the hind- 
margin and only slightly darker than the ground; the subterminal area particularly analwards lighter reddish- 
brown; the two black anal spots are mostly very thick and large. The distal margin of the darkened black 
hindwing with 2 lighter undulated transverse bands is slightly rounded, the costal margin flatly concave. Abdo¬ 
men very long. The $ ist duller brown, the lines less oblique, the median area more equally broad, the anal 
spots small. Bolivia, Colombia. 
P. angustipennis Sch. (77 a) is an extreme species of the preceding one with an entirely Sphingid angustipen- 
habitus, with still narrower and longer wings and a longer abdomen. On the dark ground of the forewing the ni - s - 
markings are quite indistinct, only visible as two nebulous darker transverse bands, the small cellular spot 
ochreous. Costa Rica. 
P. phedima Stoll, according to Schaus’ assertion, is a Prorijrons; we insert the unknown insect here, phedima. 
because the figure also shows two oblique darker nebidous bands in contrast with the other representatives 
of the genus. The shape of the figure (evidently according to a §) is the most similar to that of quadrilineata. 
Surinam. 
P. gustanda Dyar (76 d) has almost the same shape of the wings as doeri, but the distal margin of gustanda. 
the hindwing is more rounded and slightly waved; the colour is light reddish brown, in the cellular areas variably 
strewn with blackish, with yellowish veins, intensely intermixed with whitish-grey hair-scales; median and 
marginal areas hardly darker than the ground. Lines as in doeri, but the median area is more equably broad, 
the blackish, narrow discal longitudinal patch distinct, prolonged almost to the base, the small yellowish sub¬ 
terminal lunae are feeble, the anal spots tiny or absent. Hindwing of a bright red-brown colour. Ground¬ 
colour of $ much lighter, reddish-brown, the hindwing particularly light. Mexico. The penis is somewhat similar 
to that of conradti, with 2 very long spines. 
P. tamsi sp. n. (76 d) is above strikingly similar to gustanda, so that it is unnecessary to describe its tamsi. 
colour and marking; but the species is of only half the size with broad wings, a straighter distal margin and 
a much shorter abdomen, almost as in lineata. The costal margin of the hindwing is straight, in gustanda 
deeply concave. The marking of the hindwing beneath is very different; the basal half of the hind-margin is 
occupied by a deep dark brown triangle above which there is another red-brown triangle at the base in the 
yellowish-white costal-marginal half; in gustanda the hindwing beneath is monotonously light reddish-brown. 
Mexico (Zacualpan). Type in the Coll. Draudt. 
VI 72 
