396 ENTOMOLOGICAL NEWS. [Nov., IQII 



p. 254) which he thought might perhaps "belong to some of the 

 large Indian species, Macrogomphus or Heterogomphus" ap- 

 pears to agree well in venation with adult Macrogomphus in 

 the Museum of Comparative Zoology. The following venation- 

 al characters should enable any one with adequate material to 

 determine (I have no specimen of Macrogomphus now in my 

 possession). There is a basal subcostal cross vein, and the 

 hypertrophied antenodals are the first and fifth in the fore wing 

 and the first and sixth or seventh in the hind wing. There are 

 no cross veins in any of the triangles, but there are three 

 medio-cubital cross veins in the fore wing two before the one 

 forming the inner side of the subtriangle. Ante- and post- 

 nodals are 16:12 and 14:11 in fore and hind wing, respective- 

 ly. There is a semi-circular, Ophiogomphiis-like anal loop of 

 two cells, with the cells of the anal margin before it irregular, 

 and beyond it regularly arranged in double rows between the 

 straight rear sectors. 



Hagen's "Ophiogomphus" No. 10 can hardly belong to the 

 genus Ophiogomphus, for the nymphal venation shows that the 

 anal loop is composed of a single subquadrate cell, elongate in 

 the axis of the wing and with parallel front and rear sides. 

 The nymph also differs from the typical members of the 

 genus in (a) absence of lateral spines from the abdominal seg- 

 ments, (ft) in the flange that is developed upon the sides of the 

 hind angles of the head, (c} in the spatulate flattening of the 

 third antennal segment toward its tip, and the insertion of the 

 minute fourth segment upon the inner angle of the tip, (d) in 

 the straightness of the lateral lobe of the labium, and O) in the 

 length of the tenth abdominal segment, it being hardly shorter 

 than the ninth segment. 



EXPLANATION OF PLATE XIV. Labia of Gomphine nymphs. In all, 

 the inner aspect of the mentum, and parts distal thereto, are shown. 

 Fig. i. Gomphoides species. Brazil. 

 Fig. 2. Gomphoides species. Brazil. 

 Fig. 3. Cyclogomphns species. India. 

 Fig. 4. Unknown genus. Brazil. 

 Fig. 5. Cyclophylla species. Brazil. 

 Fig. 6. Gomphus species. Illinois. 

 Fig. 7. Onychogomphus Hneatits. India. 

 Fig. 8. Ictinus species. India. 

 Fig. 9. Part of the spinulose border of the middle lobe of the same. 



