THE IMMATUEE STATE OF THE ODOXATA. 31 



lower angle produced in tooth, inner edge shnrply denticulated. Movable 

 hook, sharp, bent, not reaching base of opposite one. Prothorax small, 

 nearly as broad as occiput, notched in front; median line impressed; front 

 angles produced and sharp. Processes long, not very sharp, not much sep- 

 arated ; posterior half as long as anterior. Legs short, of nearly equal 

 length, middle legs reaching seventh segment ; femora somewhat bent. 

 Wing cases nearly reaching segment five. Abdomen broad, rounded above, 

 rounded off rather abruptly beyond seventh segment. Segments of nearly 

 equal length, tenth shortest, almost smooth ; eight dark points on each seg- 

 ment, as in B. pratense. Stout lateral spines on segments four to nine, 

 smaller on four and five. Lateral spines on segment nine only one third 

 length of tenth segment. Appendages stout, blunt, one half longer than 

 segment ten. Lateral inferiors cut obliquely at tip ; middle a little notched 

 on tip, as long as inferiors. Lateral superiors cylindrical, strong, pointed, 

 somewhat more than half the length of middle one. Female A'alve reach- 

 ing end of segment nine. There are in the collection two very young male 

 nymphae, 20 and 22 mm. long ; one from Medford, Mass., very similar to the 

 above. AntenniB six-jointed, male projection just indicated, conical, flat, 

 shorter than the lateral superiors. 



The peculiar features, unusual number of joints of antennae, etc., were strong 

 reasons for referring it, even before it was raised, to Epiteschna Heros, which 

 is the largest species living in this country, and differs so considerabl}- from 

 other species as to form a new genus. 



.aiSCHNA ? ? 



Body stout, short, broad in proportion. Head, length half breadth. 

 Eyes in anterior half of head, orbicular, rather small comparatively, pro- 

 longed at inner hind angles in narrow and extended lobe. Antenna' five (?), 

 jointed, third joint longest. Mask extending to middle legs, small compar- 

 atively ; middle third of foreborder produced in cleft lobe, having a small 

 tooth on each side of cleft. Legs strong, long, and with femora notched at 

 upper edge ; hind legs more separated at base than fore and middle legs. 

 Abdomen rather rounded behind than tapering ; tenth .segment enclo.sed 

 in ninth. Dorsal spines on all segments ; lateral spines on all segments. 

 Appendages short, stout, sharp on tip ; middle one blunt. Male projection 

 conical. 



This curious nympha was referred to Gomphina at first, with which it 



