THE IMMATURE STATE OF THE ODONATA. 29 



the latei'al superiors. Male genitals indicated ; female valve, in young speci- 

 men, — only 19 mm. long, — only half length of segment, hairy. There is 

 a smaller specimen in the coll., Lee Co., Virginia, length, 12 mm., similar ; 

 differs only in having the middle appendix more widely split and the in- 

 feriors more curved. 



This determination is only conjectural, as G. furcillata has in imago the 

 inferior appendage of the male bifid. Perhaps the young nympha from 

 Virginia may belong to G. antilope. 



NEURJESCHNA. 



Similar to Gomphseschna ; movable hook, extending somewhat beyond 

 the base of opposite one. Lateral spines on segments four to nine. Ap- 

 pendages long, middle one as long as infei'ior.?, pointed ; laterals very short. 



22. NEUR^SCHNA VINOSA (QUADRIGUTTATA). 



Plate II. Fig. 3. 

 Say. Hagen, Sj'nopsis N. Amer. Nenr. p. 130. , 



Nine nymphre, male and female, full-grown and young, in alcohol. 

 Length, 35 mm. ; breadth, 7 mm. Coll. Mus. Comp. Zool. Locality, Berk- 

 shire, Tioga County, N. Y., from M. A. Mayer; Kentucky; Vermont; Lake 

 Superior. 



Long, rather stout. Head as in G. furcillata. Eyes broader at inner 

 hind angles. Vertex shorter. Ocelli hardly indicated ; antenna^, third joint, 

 as long as first and second ; fourth more than half leno-th of third ; following 

 as long as fourth. Occi[)ut notched behind. Sides oblique ; parallel bands 

 on hind angles less defined. Ma.sk extending to between middle legs, rather 

 narrow in proportion; middle third of front border produced in obtuse lobe, 

 cleft, and with a black tooth on each side of cleft. Palpus .similar to G. fur- 

 cillata. Movable hook reaching somewhat beyond base of opposite one. 

 Prothorax similar. Processes more prominent, .'^harp, of nearly equal length, 

 and enclosing rather less than right angle. Anterior more comisressed. 

 Legs rather stouter in proportion, .short ; hind legs reaching seventh seg- 

 ment. Femora and tibia3 with two paler rings. Tar.sd joint darker at end. 

 Wing cases reaching .somewhat beyond middle of fourth segment. Abdo- 

 men straighter at side than Gomphteschna; rough,- marked with eight polished 

 impressions. Lateral spines on segments four to nine, those on ninth nearly 



