PHILIP P. CALVERT. 43 



specifically difFereut as shown by the shapes of their appendages. 

 Only one can be a type, as it alone has " fronte infra .... rubro- 

 pallidis" and " mesonoti vitta lateral! pallida" ; the other two are a 

 Pseudagrion pnetextatum Selys (= P. Deckeni Gerstaecker, Kai'sch, 

 Berl. Ent. Zeit. xxxviii, p. 38, 1893) and a Paeudagrion species 

 which I could not identify. 



In the M. C. Z. is a male with the label " A caffruni Burra. type * 

 coll. SoiiTier" in Hagen's hand ; it agrees with the descri[)tion of the 

 presumed type at Halle which follows : 



% (type). Vertex blackish with metallic green reflection in parts; an indis- 

 tinct postocular spot and occiput reddish (?) ; frons and the nrst two joints of 

 antennfe pale reddish brown, clypeus and labium luteous, labrum yellow-orange, 

 rear of head yellowish. 



Prothorax blackish, a yellowish spot above the first legs; hind margin entire, 

 rounded. 



Thoracic dorsum black with some green and blue metallic reflections; a nar- 

 row, pale blue, antehumeral stripe; sides perhaps pale blue in life, markings 

 obscured in drying, but aj)parently there was a black line on the upper half of 

 the (obliterated) first lateral suture and a complete black line on the second 

 lateral suture. Pectus pale yellowish. 



Legs (3 wanting) luteous, femora superiorly, tibise anteriorly black. 



Abdomen : dorsum of 1-8 and of 10 black with blue metallic reflections. Ar- 

 ticulation between 8 and 9 and dorsum of 9 pale blue; sides of 9 black, connected 

 on the dorsum with that of the opposite side by a transverse, apical, black band 

 whose width is equal to one-fifth of the length of the segment. Apical margin 

 of 10 concave to a depth of not quite one-half the length of the segment. Ventral 

 surface of 1-10 yellow. 



Appendages clogged with some yellow substance which renders accurate de- 

 scription diificult. Superiors slightly longer than 10, directed slightly down- 

 ward ; viewed from above, slightly curved throughout their entire length, the 

 convexity outward, tip of inferior branch directed inward as a fine black point. 

 Viewed in profile, the superior margin is slightly convex ; apical half bifid, infe- 

 rior branch directed downward at an angle of 45° with the superior, which is 

 continued in the prolongation of the basal half of the appendage ; the inferior 

 branch reaches hardly farther backward than does the superior branch (compare 

 this description, however, with PI. I, figs. 2 and 3, from the much better presei vcd 

 type in the M. C. Z.). 



Inferior appendages about half as long as the superiors, apparently slender 

 and directed upward and backward. 



Wings: pterostigma reddish brown with a narrow yellowish line immediately 

 within the bounding black veins, outer side slightly more oblique than the inner, 

 surmounting one cell ; three antenodal cells. 



Front wings with upper side of quadrilateral slightly less than half as long as 

 the lower side: 15 E. 16 L postnodals; nodal sector arising slightly in front of 

 the seventh postnodal. 



Hind wings with upper side of quadrilateral slightly more than half as long 

 as lower side ; 15 E, 14 L j)ostnodals ; nodal sector arising slightly in frout of the 

 sixth postnodal. 



Total length 43.5. Abdomen 35. Frout wing 27. Hind wing 26. 



TRANS. AM. ENT. SOC. XXV. JULY. 1898. 



