1914] Mann—Myrmecophilous Insects from Mexico 173s 
Myrmecoblatta rehni sp. nov. 
Female: (Fig. 1). Length 5 mm. Width 3 mm. Color reddish-brown, the 
legs lighter, above regularly punctate and finely setose. Thorax longer than 
broad. Pronotum broader than long, with concave posterior border and extended, 
narrowly rounded angles. 
Meso-and epinota subequal, 
with nearly straight sides and 
concave posterior border. Ab- 
dominal segments 1—7 sub- 
equal, with straight posterior 
borders, the eighth con- 
siderably narrower than the 
seventh, rounded behind. Cerci 
8-jointed, a third as broad as 
long, acuminate for apical half 
their length; nearly as long as 
the sub-genital plate. Head 
about as broad as long, the 4 
front with an indistinct Y- 
shaped suture. Labium ob- 
tusely pointed, concealing the 
mandibles. Eyes occupying 
the sides of the head, faintly 
emarginate on the inner bor- 
der. Antenne slender, shorter 
than the body, about 37- 
jointed; the third joint twice 
as long as the fourth, joints 
4-13 transverse, the rest dist- 
inctly longer than broad, and 
sub equal; all the joints finely 
setose. Legs short, rather flat, 
the femora armed at apex with a slender curved spine; tibize bearing on the outer 
border three slender subequal spines, at the apex two long and two shorter spines. 
Male: (Fig. 2). Length 4.5 mm. Width 2mm. Color and setosity similar to 
that of female. Pronotum 
proportionally slightly broader 
than in the female, the angles 
broadly rounded, posterior 
border concave. Tegmina ex- 
tending a little more than 
two-thirds the length of ab- 
domen, broadly oval in out- 
line, the apex narrowly 
rounded; venation not very 
Fig. 2. Myrmecoblatta rehni gen. & sp. nov. _ distinct. Wings less than half 
Ventral surface of last gastric segments of male. the length of tegmina. Cerci 
Fig. 1. Myrmecoblatta rehni gen. & sp. nov. 
Ventral surface of female. 
