PHILIP P. CALVERT 333 



Abdominal segment two ^\'ith a narrow, mid-dorsal, longitudinal, yellow 

 stripe reaching caudad to the transverse anteaj)i("d row of denticles and 

 bordered on each side with brown; thi-ee with a mid-dorsal, longitudinal, 

 yellow line which is not confluent with yellow on each side of the segment, 

 which lateral yellow extends for almost the entire length thereof; four to six 

 with a mid-dorsal, basal, yellow spot, occupying the basal fourth on four, 

 less on six, not confluent with yellow on the sides in the basal third of each 

 segment; seven yellowish in its anterior half or shghtly more, except for a 

 transverse brown stripe at one-third of the segment's length, remainder 

 blackish brown; eight to ten blackish brown with indefinite yellowish or 

 reddish-yellow markings on the sides. 



Vertex similar to that of subsimilis cf , occiput with two prominent trans- 

 versely elongated convexities which occupy almost its entire dorsal surface, 

 no dorsal pits or posterior tubercles; rear of the head undifferentiated. 



Abdomen 37 to 40 mm.; hind wing 34 to 36 mm. 



Epigomphus subsimilis new species (PI. XIII, figs. 1 to 7.) 



o". Abdominal segment eight distinctly wider at its posterior end (2. .5 to 

 2.8 mm.) than at its anterior end (1.1 to 1.6 mm.), nine subequal in width to 

 the Irind end of eight, but widening slightly caudad, ten a little wider (2.8- 

 3.2 mm.) than the hind end of nine and distinctly higher (2.7-2.9 mm. vs. 

 1.75-2.1 mm.), its dorsal surface convex when viewed from beliind but without 

 a tubercle, having two dorsal groups, one right and one left, of two to eight 

 spinules and on each lateral surface a group of similar more numerous spinules. 

 Superior appendages 1.25-1.5 mm. long, shorter than nine, each one, in 

 dorsal view, having the inner (mesal) edge sUghtly concave, the outer (lateral) 

 edge almost straight, the two edges distinctly divergent from base to apex, 

 apex truncate a little obliquely mesad and caudad, the inner (mesal) angle 

 the more acute; in profile, the upper and lower edges convergent, the upper 

 edge longer and slightly convex, the lower slightly concave, the lateral apical 

 angle of the dorsal view not projecting below the lower edge (when the ap- 

 pendages are not spread apart, as is usually the case in specimens which have 

 not been prepared in the way that the original of our fig. 2 has been) but the 

 mesal apical angle produced ventrad below this edge as a moderately curved 

 subacute process. 



Inferior appendage a httle longer than the lower edge of the superiors, 

 hence projecting a short distance beyond the latter, bifid in its distal half, 

 the apices of the two branches less distant than the ai)ices of the superiors; 

 m profile the tip of each branch is shallowly bifid the upper division stouter, 

 more rounded, recurved, the lower a httle longer and directed caudad and 

 sUghtlv rorsad. Dorsal surface of the appendage concave, mesal margms 

 of its twf branches elevated and with a conical tooth at the proximal sixth; 

 right and left margins of the whole appendage diverging shghtly, the distance 

 between the tips of its branches (1.4 to 1.5 mm.) greater than the width 

 (.7 mm.) of either branch at base, opposite (i. c, mesal) edges of the two 

 branches diverging strongly throughout. 



TRANS. AM. ENT. SOC, XLVI. 



