286 H. A. HAGEN. 



short, 6 to y longer, 7 and 8 longest, witn the apical dorsal margin widely notched ; 

 10th short, inserted entirely in a large obcordate excision of 9th ; lateral spines on 

 4 to 9, longest and sharpest on 7th ; short, blunt on 9th ; lateral edges of 7th to 9th 

 with a thick comb of very short hairs; 8 to 9 with a basal bunch of longer hairs 

 on the edge ; dorsal hooks on 2 to 8, the basal ones small, sharp, 6 to 8 forming a 

 dorsal crest, which is marked very little on base of 9th; anal appendages very 

 stout, short, blunt, the laterals a little shorter, but as blunt as the others; abdomen 

 above rough, covered densely with very short scales; scars without them, four 

 rounded dark spots on each segment; ventral sutures as in other species; legs 

 similar, not very strong; femur of posteriors reaching 7th segment; the male 

 genitals are indicated on segments 2 and 3 and on 9. 



. There is no doubt that the nympha belongs to Ictinus, and as /. pug- 

 nax is the only species known from S. Africa, the nympha may belong 

 to this species. 



43. Genus? species. 



Cabot, Aeschina p. 31, No. 24, pi. iii, fig. 3. 



Male nympha, dry, from Laguayra, Venezuela and from Chili, in 

 Prof. Kosenhauer's collection. Length 37 mm.; breadth 13 mm. 



I may not repeat here the very detailed description published in 1881. 

 This curious nympha was referred to Gomphina at first, with which it 

 agrees more in general appearance than with Aeschmna. The 3-jointed 

 tarsi and slender antennae are like Gordulegaster, from which, however, 

 it is excluded by the diifereut shape of mask, which again refers it to 

 Aeschnina. The anteuniB are only 5-joiuted. 



After all I confess that it seems scarcely to belong to Aeschnina. 

 Perhaps it belongs to Petalia or to Phenes. 



Sub-family CORDULEGASTRINA. 

 Hagen, Synopsis Odonata of America, Proc. Bost. Soc. Nat. Hist, xviii, p. 50. 



The nymphae of the sub-family of Gomphina are quite polymorphous, 

 nevertheless all agree in some important characters. The mask is flat- 

 tened, and its tip never surpassing the margin of the labrum ; the 

 palpus is narrow, and when closed lying upon the plate inserted below in 

 the margin of labrum, which forms a kind of cap ; the eyes are lateral 

 and distant more or less from the front angle of head ; the antennas are 

 4-jointed, the third very large, fourth rudimentary ; the tarsi of the four 

 anterior legs never 3-jointed ; body and abdomen more flat. 



The nymphae of the sub-family of Cordulegastriua difier diametrically 

 in all those characters. The mask is large, spoon shaped, covering the 

 anterior part of head, labrum and front, lying, when closed, in the deep 

 groove made by the projecting anterior part of the front with the nasus ; 

 the labrum is similar to that of the imago, its anterior margin hairy 



