MORGAN IIEBARD 
413 
distal margin transverse, thickened, very feebly concave laterad and broadly 
mesad. Pygidium, in very brief jiroximal portion, deplanate, other portions 
transversely convex ; lengt h slightly more than twice the greatest width, lateral 
margins very feebly convex divergent to slightly beyond median point, there 
with a minute rounded projection, beyond distinctly narrower, with lateral 
margins convergent to the sharply rounded apex. P^orceps more elongate 
than in female, parallel to distal curvature and bearing to that point on ventro- 
internal margin a slight flange, with its margin subserrate to its distal portion, 
where it is weakly but conspicuously and broadly widened, with its margin 
there smooth and convex. Disto-ventral abdominal segment with length 
fully half its width, broadly rounded disto-laterad, with distal margin very 
feebly concave and supplied with a thick fringe of very short hairs. 
Measurements (in millimeters) of extremes 
cf Motzorongo. (14) 
9 Motzorongo. (14) 
Length of Length of 
body pronotum 
6. 8-9. 3 1.6-1. 7 
7.2-10 1.6-1.75 
Width of Length of 
pronotum forceps 
1.3- 1.35 27-3.7 
1.3- 1. 4 2.3-28 
The series averages nearer the maximum. 
Specimens Examined: 39; 14 males, 14 females, 11 immature examples. 
Vera Cruz, Vera Cruz, Mexico, I, 1892, (L. Bruner), 1 juv. 
Motzorongo, V. C., Mex., I, 1892, (L. Bruner), 14 cf, 14 9 , 10 juv. 
MICROVOSTOX Hebard 
1917. Microvostox Hebard, Trans. Am. Ent. Soc., xliii, p. 310. 
We would note that the form of the distal antennal joints is one 
of the most striking features for separating the species of the 
present genus from those of the Labiinae. These joints in 
Microvostox are elongate, cylindrical, their diameter being the 
same through almost their entire length. The eyes are incor- 
rectly given in the original description as being appreciably 
shorter than the cheeks. In some of the species the eyes when 
seen in dorsal aspect would appear slightly shorter than the 
cheeks, but when viewed from the side their actual length is 
found to be fully as great as, or appreciably greater than, that of 
the cheeks. The length of the caudal metatarsus ranges in the 
species of the genus from as long as, to appreciably longer than, 
the combined length of the succeeding tarsal joints; no individual 
variation in this feature is noted, the differences being of specific 
diagnostic value. 
We would assign the following species to Microvostox, in linear 
arrangement as given below. Those marked with an asterisk 
are represented in the collections before us. 
TRANS. AM. ENT. SOC., XLIII. 
