32 THE IMMATURE STATE OF THE ODONATA. 
agrees more in general appearance than with schnina. The three-jointed 
tarsi and slender antennx are like Cordulegaster, from which, however, it 
is excluded by the different shape of mask, which again refers it to 
“Eschnina. 
A nearer determination is now not possible. 
24. ZASCHNA (?) SPECIES. 
Puate III. Fie. 3. 
Male nympha, dried. Length, 37 mm.; breadth, 13mm. _ Locality, La 
Guayra, Venezuela. 
Stout, short, broad, somewhat depressed, in general looking like some 
forms of Gomphus. Head, body, and legs covered with cylindrical or pyr- 
amidal spines, dark at the base and light-yellow at upper portion, which has 
a slight depression, in which there may be an orifice. The spies point 
backward, and vary in size. Head large; breadth, twice length. Eyes 
prominent, prolonged at the inner angle into a triangular lobe, which in the 
specimen is wrinkled so as to have appearance of vanes of a feather.  Sit- 
uated in front of this is a polished ridge lighter in color. Upper lip very 
large. Vertex rather wide and slightly convex ; posterior portion showing 
indications of ocelli. Antenne rather short, five-jointed; two basal joints 
globular; third as long as both basals, cylindrical ; fourth shorter than fifth, 
which is also shorter than third and pointed. It is possible there may be 
two more rudimentary joints; but from the single specimen, which has only 
one of the antennz, it is impossible to decide. Occiput rather deeply notched, 
sides oblique, hind angles rounded. Just back of eyes is a small conical 
projection near each side. Mask small in proportion, extending between 
middle legs, narrow and gradually enlarged; middle third of foreborder 
somewhat produced, and cleft surmounted by comb of light hairs, and with 
a small tooth on each side of cleft. Palpus nearly if not quite smooth. 
Movable hooks, slender, and bent near tip. Prothorax as broad as occiput ; 
cut rather square at sides, and projected in rather sharp angle at forward 
part. Stigmata entirely covered. Thorax rather long in proportion. Legs 
strong, formed for running; fore and middle legs of nearly equal length ; hind 
lees longer, reaching ninth segment. The femora of all the legs are stouter 
and shorter than the tibia, and have a notched hook on the upper edge;- tarsi 
three-jointed. Processes above fore legs of equal length; posterior one tri- 
angular, sharp; anterior large, square, notched at tip. Abdomen stout, 
