8 University of Michigan 



shown in PI. I, fig. 2; the second hamule is yellowish green, the 

 ventrally directed apex black, shading out basally. The an- 

 terior part of the seminal vesicle consists of two wide-spread- 

 ing, short horns, one on either side. The anterior lamina is 

 straight. Segment i has a ventral median tuft of bristles. 



Female. — Differing from the male as follows : rear of head 

 very light brown. Face and frons above duller, bluish-green, 

 markings less distinct, the median spot on the labrum brown 

 or yellow. Occiput with a small blunt horn or prominence at 

 either end (PI. I, figs. 9 and 10). Prothorax (PI. I, figs. 7 and 

 8), pale colored, very light brown above, almost white on the 

 sides. Thorax light dull blue, markings paler than in the 

 male, dark brown to paler rtisty brown, the middorsal dark 

 area and the dark stripe next adjoining it distinctly to scarcely 

 darker than other dark markings, the median dark area and 

 the next adjoining dark stripe sometimes separated dorsally 

 and the latter stripe usually without any connection with the 

 antehumeral stripe, but continued below with the lower part 

 of the stripe, which, in the male, is separated from the upper 

 part ; in some specimens the dark lateral areas, posterior to the 

 humeral suture, scarcely evident. Abdomen more robust than 

 in the male, api)arently patterned similarly to the male ; i and 

 2 largely dull light blue similar to the metepimeron ; auricle 

 w^anting ; about the apical half of 5 and 6 are dark, 10 is similar 

 to 9, with more or less pale yellowish or light brown areas, 

 especially apically and opposite the superior appendages. Ap- 

 pendages brown and short. Vulvar lamina dark brown or 

 black, nearly reaching the apex of 9, with a broad short base 

 and tw^o long branches (PI. I, fig. 11), which may lie nearly 

 parallel, as in the figure, or may have the apices separated a 

 distance equal to two-fifths the length of the lamina. Prob- 

 ably the latter condition results from ovipositing. In length 



