NORTH AMERICAN NEUROPTERA. 275 



thin, conical, strongly recurved, about one-fourth the length of the third joint; 

 mask extending to forelegs, narrow, oblong, half as broad, somewhat enlarged at 

 front border, the middle third produced in a serai-circular lobe, with a long comb 

 of fiat scales; palpus just reaching, nearly straight, rounded on tip, smooth inside; 

 movable hook short, bent, sharp; prothorax nearly as broad as head, large, trans- 

 verse-oval; wing cases exceeding a little segment 4th; abdomen Aeschna like, 

 three times as long as broad, flattened below, rounded above, tapering from 6th 

 segment; segments of about equal length, the two basal a little shorter, 9th a little 

 longer ; dorsal hooks on segments 1 to 9, the three basal very strong, the follow- 

 ing much smaller; lateral spines on 5 to 9; scars as usual, encircled behind by a* 

 brown border; base of segments on each side with two triangular brownish spots; 

 longitudinal ventral sutures ending at the apex of 8th segment, the middle space 

 a little longer ; segments 2 to 8 on each side with a brown crescent band ; appen- 

 dages longer than 10th segment, triangular, very sharp, laterals less than half 

 shorter; legs stout, very strong, hairy, typical burrowing legs; tibias thick after 

 base, bent up at tip, without apical hook; middle legs nearer at base than fore- 

 legs, hind legs nearer at base than forelegs, hind legs widely separated, reaching 

 nearly 8th segment, third joint of tarsi longer than the two basal, claws long, 

 sharp; the claws of four anterior legs blunt. 



As P. obscurus has now been collected near Boston, by Mr. Morrison, 

 there can be scarcely a doubt, that the nymphae belong to this species. 



31. Pro$;oiii|>hus spec. 

 Cabot, p. 7 (note at the end). 



A female nympha from Carundahy, Brazil (Cabot's type), a nympha 

 from Bio dos Macacos, Brazil, four nymphae from Bio Negro, Amazon, 

 two young, all in alcohol, from Thayer expedition. Length 20 to 25 mm. 



The later discovery of the *other nymphae from Brazil proves that 

 there has been no mi.stake in the label, as was supposed, when Mr. Cabot 

 published the monograph of Gomphina. Nevertheless, even to-day with 

 so much more material before me I am at loss to find structural differ- 

 ences. The nympliDS from Brazil are indeed less bulky and more slender 

 and the lateral appendages rather shorter, only one-third of the laterals ; 

 until now P. obscnriis has not been found in Brazil, and it seems probably 

 that these nymphae belong to a different species. 



32. Progoinphiis spec. 



Six nymphae in alcohol young and some probably full grown from 

 Santiago, Cala., by Mr. Gr. B. Crotch, 1872. Length 20 to 27 mm.; 

 breadth 7 mm. 



These nymphae are so similar to P. obscurus, that it is difficult to sepa- 

 rate them ; but all have lateral spines on segments 3 to 9 instead on 5 to 

 9. The black spots above on abdomen are larger ; the ventral segments 

 6 to 10 have transversal basal black bands, enlarged to the lateral mar- 

 gins ; the abdomen a little broader. 



