62 entomological news. [March, 



instead of at the apex only, as in typical Ophiogomphus. This 

 species is, therefore, to this extent, intermediate between the two 

 genera named with stronger affinities to Ophiogomphus." 



62. Gomphus scndderi Selys (PI. v, figs. 6-8). 



O 71 (hitherto unknown). — Length 58 mm., abdomen 43 mm., hind wing 

 35 mm. Black, fuscous and greenish yellow. 



Frons greenish yellow with a black band on the lower edge above the 

 articulation with the clypeus. Yellow of the post-clypeus divided into 

 three areas by a black patch each side of the middle; ante-clypeus black. 

 Labrum yellow, with anterior border black. Base of mandibles and 

 labium greenish yellow; vertex and antennae black. The basal joints of 

 the antennae with a yellow ring on the distal end. Occiput greenish yel- 

 low, the crest slightly convex and armed with black hairs. Rear of eyes 

 pale. 



Prothorax unicolored. Thorax fuscous, mid-dorsal carina black and 

 prominently crested in the middle. The narrow anterior transverse stripe 

 (interrupted at the mid-dorsal carina) and the narrow ante-humeral stripes 

 (much divergent below), greenish yellow. Sides of thorax with three 

 yellow stripes, the anterior best defined, the dark stripes alternating at 

 the first and second lateral sutures. Three greenish yellow spots on dor- 

 sum between the wings. Underside of anterior femora pale. Hind 

 femora with numerous short bristles. 



Wings hyaline, pterostigma 4 mm., broWn; ante-cubitals 15-16, post- 

 coitals io-n. All triangles and basal spaces free from cross-veins. 

 Arculus angled, the spaces below and above the union of the sectors equal. 

 Outer side of triangle straight. 



Abdomen black. Segments 7, 8 and 9 much dilated. Eighth segment 

 nearly 7 mm. wide. Segments 3-10 with basal yellow rings, those on 8, 

 9 and 10 reduced to sutural lines. An acute, triangular, mid-dorsal, basal 

 spot on the eighth segment and a smaller spot with an obtuse angle on 

 the basal dorsum of the ninth. Dorsum of 1 and 2 with narrow yellow 

 stripes. Auricles and a round spot behind them on the sides of 2 yellow. 

 A lateral yellow line, faint on segments 4-6, but prominent as large basal 

 spots on 7, 8 and 9. 



Superior appendages black, stout, longer than 10, very divergent at tip, 

 where the acute points are 3 mm. apart and considerably wider than the 

 breadth of 10. On the inferior surface, in their apical third, are about six 

 low, broad crenules seen by microscope in profile view. 



Inferior appendage brown, nearly as large as the uppers, flattened at 

 the base and excavated above, more widely divergent in the middle than 

 at either end, wider in the middle than the superior appendages and 

 equally divergent at the tip. The ends turned upward and approaching 

 the superior appendages. Both appendages armed with bristles. 



Nearly related to Gomphus fraternus, but much larger, abdo- 



