PHILIP P. CALVERT 379 



place described below as E. Inurenti, but in all other (color) 

 respects it agrees with true poUutuni females. 



]\Irs. Annie Trumbull Slosson has recalled the delightful cor- 

 respondence of earlier days by lending to me again the specimens 

 from Florida in her collection which I had identified years ago. 



Air. C. H. Kennedy, at my request, has studied and made 

 drawings of the penes of the males of poUidutn, laurenli and ves- 

 perum from which drawings of the aljdominal appendages had 

 been made by myself. His drawings are reproduced as figures 24 

 to 30 of plate XXXIW Neither Mr. Kennedy nor I have investi- 

 gated the amount of variation in this organ which may exist 

 within the species. These figures are not oTered, therefore, as 

 specific criteria, although they may be such; they will, at least, 

 aid in fixing the identity of the type specimens for future 

 researches. 



Mr. Nathan Banks has kindly compared drawings of the ap- 

 pendages and notes on the color-differences of poUutum, laurenli 

 and vesperum with Hagen's tj^pe of pollutum in the Museum of 

 Comparative Zoology, and confirmed the identity with the species 

 here given that name. He adds that the apical margin of the 

 superior appendages of the male type of pollutum is "more evenly 

 curved than your figure and the two processes are further apart. 

 Above it looks like your figure." 



Enallagma laurenti new s{)ccies (Plate XXXIII. figs. 4, IS, 19; plate 



XXXIV, figs. 27, 28.) 

 Enallagma polluium Castle »i: Laurent, Ent. Xe\\>, vii, 302, l.S9t) (male = type). 



cf . Superior appendages in profile vi(nv, with the apical margin subequal 

 to the inferior margin, 'convex; in dorsal view, the intero-inferior lamella 

 rtsaching beyond the level of the supero-internal subapical hook. 



Nasus orange, traces of a faint black transverse Ymv on each side. 



P'rons: pale color of the anterior surface attaimng the median ocellus. 



Pale (yellow) jjostocular spots largely confluent with the yellow of the rear 

 of the head. 



Middle prothoracic lobe orange or yellow, a transverse black stripe along its 

 hind margin, where it joins the hind lobe, from which extends forward on each 

 side an indistinct longitudinal blackish or dark brown line. 



\\'idth of black mid-dorsal stripe .3o-.42, of pale antehumeral .49-.otJ, of 

 black humeral from a mere line (type) to .10 mm. (The larger dimension 

 given for the first two stripes is that of the type.) 



Second lateral thoracic suture with a black stripe or line on its uppermost 

 fourth only. 



Labrum orange with three i)asal black points, one median, one right lateral, 



TR.V.NS. AM. ENT. SOC, XLV. 



