GOMPHUS. 103 



Length 54 millim. Alar expanse 76 millim. Pterostigma 4 

 millim. 



Hob. North America (British Museum). 



10. G. spoliatus! 



Gomphus spoliatus Hag.! Monog. Gomph. 409, 36 bis ; pi. xxi, fig. 1. Se- 

 lys, Addit. Synops. 17, 32 bis. 



Yellow, spotted with fuscous ; head yellow ; thorax yellow, dor- 

 sum with two medial, contiguous, anteriorly broadened stripes, and 

 two oblique ones each side, fuscous; sides yellow, with fuscous, 

 oblique lines each side; feet black, the anterior and posterior pairs 

 of femora yellowish beneath ; the posterior femora extremely long, 

 spinous ; abdomen long, slender, the apex very much dilated, yel- 

 low, the second segment each side, with a large angular spot, seg- 

 ments 3 6 each side, with a point and apical triangular spot, 

 black ; appendages like those of G. spinosus, yellow ; wings hya- 

 line, pterostigma large, yellow. Male. 



13 14 antecubitals; 8 10 postcubitals; two discoidal areolets. 



Length 60 millim. Alar expanse 74 millim. Pterostigma 3 

 millim. 



Hob. Pecos River, Western Texas (Capt. Pope). 



Is this not the teneral stage of G. armatus ? 



11. G. dilatatusl 



Gomphus dilatatus Ramb.! Neuropt. 155, 2. Selys ! Monogr. Gomph. 123, 

 37; pi. vii, fig. 3. Selys, Synops. 28, 31. 



Black, spotted with yellow ; head yellow, with two stripes in 

 front and a third before the eyes, black ; dorsum of the thorax 

 black, with two yellow stripes each side ; sides yellow, each side 

 with two oblique black streaks ; feet black, anterior femora beneath 

 yellowish; the posterior femora longer; abdomen slender, long, 

 the apex strongly dilated, excavated, black, segments 1 7 with a 

 dorsal middle fascia, segments 1 3 each side with a lateral fascia 

 and segment 9 at the sides, yellow ; appendages black, superior 

 ones short, cylindrical, incurved, the apex beneath, obliquely trunc- 

 ated, acute ; the inferior one broad, bifid ; wings hyaline, ptero- 

 stigma moderate, black ; the membranule broader, cinereous ; 

 vulvar lamina long, excised, bifurcated ; thirteen antecubitals ; 

 fourteen postcubitals ; two discoidal areolets. 



