GOMPHOIDES. 113 



4. G. elongata. 



Cydophylla elongata Selys ! Monog. Gomph. 224, 84 ; pi. xii, fig. 5. 

 Selys ! Addit. Synops. 20, 79 ter. 



Black, spotted with olive ; head olivaceous in front, labrum mar- 

 gined with black, and with a black fascia upon the middle ; thorax 

 black, dorsum each side with two narrow stripes, and each side 

 with three stripes, olivaceous; feet black, anterior femora pale be- 

 neath; abdomen long, slender, black, the base and apex inflated, 

 segments 3 1 with a basal, hastiform, yellow spot ; appendages 

 brownish-black, subcylindrical, forcipated, the apex subexcised, 

 the inferior appendage scarcely apparent ; wings hyaline, ptero- 

 stigma large, rufo-fuscous. ^. Sixteen antecubitals; ten postcu- 

 bitals ; two discoidal areolets. (From the description of De Selys 

 Longchamps.) 



Length 62 millim. Alar expanse 72 millim. Pterostigma 5 

 millim, 



Hob. Mexico (Paris Museum). 



5. G. protracta! 



Cydophylla protracta Hagen ! Selys, Addit. Synops. 20, 79 ter. 



Blackish-fuscous, spotted with yellow ; head luteous ; thorax 

 blackish-fuscous, dorsum with two stripes, and the sides with three 

 oblique ones, yellow'; feet brownish-black, femora luteous ; abdo- 

 men long, slender, inflated at base, fuscous or luteous, membranously 

 dilated at the apex, dorsum with an interrupted, yellow line, the 

 sides luteous ; appendages fuscous, subcylindrical, forcipated, sub- 

 excised at the apex, the inferior appendage absent ; vulvar lamina 

 very short, excised ; wings hyaline, pterostigma large, yellow. 

 Twenty-one antecubitals; ten postcubitals; two discoidal areolets. 



Length 62 millim. Alar expanse 79 millim. Pterostigma 5 

 millim. 



Hob. Matamoras, Mexico. 



6. G. producta! 



Aphylla producta Selys! Monog. Gomph. 230, 83; pi. xii, fig. 6. 

 Selys ! Synops. 60, 81. Aphylla caraiba Selys ! Poey, Ins. Cuba, 

 456. 



Brownish-black, spotted with yellow ; head yellow, banded trans- 

 versely with fuscous ; thorax brownish-black, dorsum each side with 

 8 



