MORGAN HEBARD 
423 
have at present an insufficient representation of the species of the 
present subfarnilj^ to determine this. 
In the present species the antennae have eleven (twelve, 
normal) to thirteen (rare) joints, the fourth being nornrally 
subequal in length to the third, but showing some individual 
variation. The tegmina have their sutural margins sometimes 
fused. The size variation is moderately decided, but the male 
forceps show great variation, the series before us showing every 
gradation between the extremes. With reduction in the heavi- 
ness and irregularity of contour of the male forceps, the latero- 
ventral projections are correspondingly reduced. Length of 
body, cT, 6.4 to 10; 9 , 6.1 to 9.5: of forceps, cf , 2.8 to 3.2; 9 , 
2.4 to 2.9 mm. 
The 'heavier forceps are so much more curved than the more 
simple type, which is usually found in the smaller examples, that 
little difference in the actual length is found. 
FORFICULINAE 
Skalistes lugubris (Dohrn) (Plate XXVIII, figures 15 and 16.) 
1862. Forficula lugubris Dohrn, Stett. Ent. Zeit., xxiii, p. 230. [Cordoba 
[Vera Cruz], Mexico.] 
1903. Forficula metrica Rehn, Proc. Acad. Nat. Sci. Phila., 1903, p. 311. 
[Orizaba, Vera Cruz, Mexico.]. 
Orizaba, Vera Cruz, Mexico, I, 13, 1892 and XI, 1887, (L. 
Bruner), 20 cT, 32 9,2 juv. 
Chalchicomula, Puebla, Mex., II, 1892, (L. Bruner), 3 cf , 4 9 . 
As Burr has shown, Rehn’s metrica is based on the condition 
of this species in which elongate forceps are developed. 
We do not believe that S. inopinata (Burr) and S. cornuta 
(Burr) 22 are synonymous, as that author has indicated. The 
proximo-internal dorsal flange of the male forceps is slightly 
more prominent in the specimens before us with short forceps, 
but no trace of a dorsal conical projection is found. In the 
present insect the male forceps have this flange with margin 
cingulate and unbroken, below it a row of denticulations are found, 
from above only visible proximad before the commencement of 
the flange. The variation in both length and degree of curva- 
ture of the male forceps is very marked in the present series. 
21 See plate XXVIII, figures 12, 13 and 14. 
22 This name was proposed for the male sex described by Borma ns as Labia 
cheliduroides. 
TR.\NR. AM. ENT. SOC., XLIII.’ 
