PHILIP P. CALVERT 341 



receive (or be caused by ?) the "downwardly-directed spine"-" 

 of the inner surface of the left superior appendage of the male 

 (PI. XV, fig. 23, x'); this slight depression is present also, but less 

 marked, on the right side of the head, although this spine is 

 absent on the right superior appendage of the single male; per- 

 haps its presence on the right side of the female's head is con- 

 firmatory of Dr. Hance's suggestion and this female may have 

 paired also with a male which had this spine pt-esent on l)oth 

 superior appendages. 



On the dorsal surface of the head of this female certain scars 

 are visible. The best marked are a group of two (right) or three 

 (left) near the mesal margin of the facetted portion of the com- 

 pound eyes, at the same transverse level as the horns behind the 

 lateral ocelli ("vertex tubercles"). Between each group and 

 the nearer lateral ocellus another scar is visible in a groove on 

 the vertex, the parocular sulcus (prs), close to and paralleling the 

 eye margin. Parocular scar and eye scars together constitute 

 a group of superior ocular cicatrices (PI. XV, fig. 25, soc). The 

 distance from the right group of these cicatrices to the left grou]:) 

 corresponds very closely to the distance between the apices of 

 the two branches of the inferior appendage of the male (PI. XV, 

 fig. 24, soc') and the cicatrices are doubtless produced by the two 

 teeth on each side of these apices. There is what seems to be a scar 

 posterior to each "vertex tubercle," between it and the occipital 

 tubercle of the same side of the head, but I am unable to cor- 

 relate these scars with any projection on the dorsal surface of 

 the male's inferior appendage, as the "fairly slender forwardly- 

 curved spine " thereof (PI. XV, figs. 23,24 y) is situated at a greater 

 distance from the apices of the inferior appendage than exists 

 between these scars and the superior ocular cicatrices of the same 

 side of the head. It seems more likely that these spines of the 

 male come in contact with the occiput, but I find nothing there 

 of such a shape as would engage these spines. The wide, con- 

 cave, distal margin of the inferior appendage of the male is tloubt- 

 less appUed against the posterior surfaces of her two i)ostoccllar 

 or vertex tubercles (poet), while her occii)ital tul)ercles {dot) are 



2''The words enclosed in quotation marks are from the original ilescnption 

 in Biol. Cent.-Amer., Neur., p. -410. 



TRANS. AM. ENT. SOC, XLVI. 



