276 H. A. HAGEN. 



Perhaps the nymphse belong to P. zonatits, or to P. meridionalis, 

 n. sp. from Arizona, as a similar nympha 24 mm. long was collected by 

 R. Crotch, San Diego, Gala. 



Genus Gomphoides ^ raised). 

 Selys Monogr. Goinphin. p. 2(l(i. 



The principal character of the nymphas of Gomphoides is the unusual 

 length, one-third to nearly one-half of the abdomen, and lankness of the 

 10th segment. As far as yet known this character is unique among all 

 Odonata. The very slender spindle shaped abdomen, about three-quarters 

 of the whole body has the ventral sutures ending on the apical angles of 

 9th segment ; anal appendages very short, of equal length ; the four 

 anterior legs equally distant. 



There are two different groups represented ; one (Cyclophylla ? ) has 

 the front border of the narrower mask produced in a large rounded lobe 

 with a long dense comb of scales and the palpus as a short, thin, sharp 

 hook; lateral spines on T to 1). The other (Aphylla?) has the front 

 border of the larger mask produced in a very short rounded lobe with a 

 very short and wide comb of bent up pointed scales ; lateral spines rudi- 

 mentary and only on 9th segment. The mask of both reaches half way 

 between fore- and middle legs ; prothorax stigma free. 



Of the thirty-two known species only three nymphae are known ; one 

 of them just casting the skin proves fliat the nymphas belong to this 

 genus. 



33. Gomphoides spec, (raised). 



Cabot, Goiiiph. p. 8, No. 10, pi. i, fig. 5. 



One male nympha, just beginning fo transform in alcohol, from Santa 

 Cruz, Brazil, Thayer expedition. Length 37 mm. ; breadth 6 mm. 



Body long, slender; little hairy: head large, about as broad as the thorax, cor- 

 date, notched behind; eyes large and prominent: ocelli well developed; antennae 

 short, inserted in a kind of trumpet-like inflation on each side of the inferior 

 ocellus; the two basal joints globular, third twice as long, strong, dilated, bent up 

 a little, with long and dense hairs, fourth very short, linear, recurved; mask 

 reaching half way between fore- and middle legs; breadth half the length, en- 

 larged in front, the middle produced in a large rounded lobe, with a long comb of 

 dense, flat scales; palpus a short, thin, sharp hook; movable hook similar but 

 longer; wing cases reaching middle of 4th segment; abdomen long, spindle 

 shaped, venter less rounded than dorsum, tapering slowly to end of 9tli segment: 

 segments of about equal length; 10th very long, nearly one-third of abdomen, 

 very thin, nearly cylindrical; short lateral spines on 7 to 9 ; dorsal hooks on 2 to 

 7, strongest on 3d, short but sharp on the following, only indicated on 8 to 9 ; scars 

 as usual; genitals indicated; ventral sutures ending on the apical angles of seg- 



