NORTH AMERICAN NEUROPTERA. 273 



of the two basal, straight, a little dilated, bent up at tipj fourth joint very short, 

 ovoid; mask small, once longer than broad, sides oblique, bent up, front border 

 less than twice the breadth of base, middle third produced in a rounded lobe, 

 edged with pavement teeth and two small, black, longer teeth in the middle and 

 with a comb of flat scales ; palpus small, scarcely meeting, end hook sharp, strong, 

 arcuate, longer than the nearly straight margin, which is provided with ten teeth ; 

 movable hook long, sharp, arcuate ; wing cases reaching 4th segment ; abdomen 

 elongate, four times longer than broad, very gradually narrowing to tip, some- 

 what rounded above, flatter below (the figure is too broad at the base) ; segments 

 of equal length, 10th very little longer than 9th, cylindrical, narrower at tip,- 

 dorsal hooks on segments 3 to 9, thicker on segment 3. nearly obliterated (acciden. 

 tally ?) on 6, longer and sharper on 7 to 9 ; lateral spines on 7 to 9 ; scars as usual, 

 genitals not marked ; appendages long, sharp, pyramidal, inferiors as long as seg- 

 ment 10. middle one a little shorter, basal half thickened above, laterals one-third 

 shorter than the inferiors; legs short, strong, formed for burrowing; hind legs 

 longer, flatter, reaching 7th segment; third joint of posterior tarsi as long as the 

 two basal, which are of equal length. 



There is from the same collection a very young larva, length 15 mm., 

 the wing cases only marked ; antennae and mask similar ; abdomen much 

 more hairy, less elongate, more suddenly tapering, lateral spines on seg- 

 ments <S to 9 ; dorsal hooks just visible ; appendages similar ; legs longer, 

 more hairy, 'i'here is no doubt that the larva belongs to the same species. 



The nympha was formerly supposed to belong to Herpetogomphus, as 

 then this genus contained the only known species from Brazil. The dis- 

 covery of the nymphas of Herpetogomphus, one raised, and the discovery 

 of several species in Brazil representing different forms, proves that the 

 nympha does not belong to Herpetogomphus, but perhaps to some of the 

 newly discovered species. 



Among the four Gomphus known from Brazil the elongate form of 

 the nympha would agree best to E. paludosus. 



II Legio GOMPHOIDES. 

 Selys Monogr. Gomphin. p. 189. 



Of the four genera belonging to the Legio Gomphoides all are known 

 except Zonophora. The three known genera belong to entirely different 

 types, and perhaps it will be more natural to drop entirely this Legio, 

 the more so as the imagos form also a motley crowd, and so dissolve it in 

 three co-ordinate groups. 



Proffoniphus, with its Aeschna like body, the middle legs less distinct 

 than the forelegs, and the ventral sutures ending on 8th segment is very 

 different from all other Gomphina ; the prothorax-stigma is covered. 



Gomphoides with its slender spindle-shaped abdomen, the unusual 

 length of tile much more slender 10th segment, and the small mask is 

 also unique among Gomphina ; the prothorax-stigma is free. 



TRANS. AMKB. KNT. SOC. XII. (.39) DECEMBER, 1886. 



