PHILIP P. CALVERT 345 



Epigomphus quadracies (PI. XIII, figs. 8 to 10.) 



Of the five females of this species, two show superior ocular cica- 

 trices near the mesal angle of the mesal margin of each eye. One 

 of these (July 25) has each cicatrix (fig. 9, hoc) consisting of two 

 adjacent impressions in the facetted portion of the eye, accom- 

 panied by only a very slight exudation, but otherwise shows no 

 difference in color from adjoining areas of the eye; there is a 

 slight depression on the hind surface of the elevation on which 

 each lateral ocellus is situated; the dorsal surface of the occiput 

 has a pit, (dof) occupying each of its lateral thirds, the external 

 (lateral) wall of which is creased and grooved transversely; 

 there is a small, conical, supero-posterior tubercle {pot) at each 

 lateral extremity of the occiput; on the rear of the head, behind 

 each eye, at the level of not quite half-way from the mesal angle 

 of the superior surface of the eye to its extreme lateral margin, is a 

 fairly deep pit (fig. 10, p), elongated slightly obliquely from above 

 mesad and ventrad; this pit is not as deep as in the female of 

 armatus, but is deeper than in any other of the Costa Rican species 

 here considered; as in cmnatus, this pit is bounded mesad by a 

 prominent subvertical ridge (r), which in dorsal view appears 

 as a conspicuous rounded tubercle, but the lateral slope of this 

 ridge is more gradual and less steep than in armaiua; this pit and 

 ridge are above the level of the mesal angle of the posterior mar- 

 gin of the eye; below that level and almost directly ventral to 

 the lower end of the pit is a distinct cicatrix ipgc) , each consisting 

 of three adjacent impressions (or possibly four on the left), the 

 whole distinctly darker in color than the adjoining areas. 



In the female of July 26, tbe superior ocular cicatrices consist of apparently 

 a single impression each, the cicatrix on the right side of the rear of the head 

 of two adjacent impressions, the corresponding cicatrix of the left side of but 

 one impression; in all other respects this female agrees with the preceding 

 description. 



Of the other three females which have no sui)crior ocular ciciatriccs, two 

 (those of August S) hav^e the post-genal cicatrices, in one female consisting 

 each of a single impression, but the scar of the right side larger than that of 

 the left, the other female having the right cicatrix of two, the left of one, 

 impression. The third female (August 4) shows no post-genal cicatrices 

 although eggs are adhering to the ninth abdominal sternitc and to other parts 

 of her body. In other respects these three females agree ^v-ith the description 

 given above of the female of July 25. 



TRANS. AM. ENT. SOC, XLVI. 



