184 Psyche [October 
Prosopis variifrons Cr. 
1869. Prosopis variifrons Cr. 9, Pr. Bost. Soc. Nat. Hist. 12:270. 
1869. Prosopis antennata Cr. & , Pr. Bost. Soc. Nat. Hist. 12:271. 
It is probable that P. antennata is the male of P. variifrons. 
Both forms have been found in New Mexico and Colorado, but 
there is no record of the capture of the opposite sex of either species. 
The possibility that they represented the sexes of a singles species 
was pointed out by Professor Cockerell in the Entomologist, 
in 1898, and after examining specimens from both of the localities 
mentioned I am inclined to believe that this is the case. They 
agree in the following characters: deep black color with nearly 
white marks, immaculate color, tubercles and tegule spotted, 
longitudinal crenulate rugze covering the entire enclosed area 
upon the metathorax, head and thorax opaque, finely and closely 
punctured, and color of the wings. The female often has a trans- 
verse trilobed mark upon the clypeus, but in some instances only 
the two lateral lobes are present and in others only the central 
lobe. At Waldoboro I have taken only one male on Crataegus 
coccinea, June 14, 1905. 
Prosopis elliptica Kirby. 
1837. Prosopis elliptica Kirby, 9, Faun. Bor—Am. 4:266. 
This species is very closely allied to P. variifrons. Through 
the kindness of Mr. H. L. Viereck I have three specimens, which 
I refer to P. elliptica 2, collected by Morgan Hebard at Pequa- 
ming, Mich., July 1, 3, and 12, 1903. They differ from P. varii- 
frons in having the marks lemon yellow instead of nearly white, 
while the tegulz are unspotted. As in P. variifrons the collar is 
wholly dark, the tubercles spotted, the face-marks bow shaped, 
and there is a transverse mark on the clypeus sometimes reduced 
to a central spot. The differences are evidently varietal rather 
then specific and it is not improbable that P. elliptica replaces 
P. variifrons northward, as the type locality is British America. 
Until the male is definitely known its position can hardly be de- 
termined with certainty. I have taken one female at Waldoboro, 
July 2, which I refer doubtfully to this species. 
Prosopis verticalis Cr. 
1869. Prosopis verticalis Cr. &, Pr. Bost. Soc. Nat. Hist. 12:271. 
1909. Prosopis verticalis Lov. 9, Ent. News, 20:413. 
