SI ffOPSIS 0¥ SPECIES DESCRIBED. 



4. M. annulata Var. flavipennis Walsh. (Supposition.) 



One nympha, in transformation. North America. 



Head flat above; abdomen more ovate; dorsal hook on 10th segment only indi- 

 Lj lateral spin.- on 9th segment about as long as 10th segment; apical ventral edge 

 tent not hairy. 



5. M. magnifica McLachlan. (Supposition.) 



Nympha skin. male. Northwestern America. 



Head flat above, more convergent at the sides; abdomen elongated, lancet-shaped; 

 dorsal hook small on 10th segment; lateral spines on 8th and 9th segments very short, 

 sharp; apteal ventral edge of 9th segment fringed with hairs. 



6 M. taeniolata Rambur. (Supposition.) 



One full-grown female nympha. Central and Southeastern North America. 

 Body large, balky, villous; head broad, deeply notched behind; abdomen large, 

 e; dorsal hook on 10th segment reaching beyond appendages; lateral spine on 9th 

 segment sharp, slightly exceeding the 10th segment ; ventral apical edge of 9th seg- 

 ment not hairy. 



7. M. spec. (Supposition.) 



Two probably full-grown nymph*. Mexico. 



Similar to M. annulata var. flavipennis; body shorter, head very broad, slightly de- 

 pressed behind in middle ; abdomen ovate ; dorsal hook on 10th segment very small, 

 erect, triangular, blunt at tip ; lateral spine on 9th segment fiat, sharp, half again as 

 long as 10th segment. 



8. M. Moorei Selys. (Supposition.) 



Four nymphse, none full-grown. Kooloo, Himalaya. 



Body villous ; head flat ; abdomen large, ovate ; sides of last segment villous ; dor- 

 sal hook on 10th segment extending beyond appendages ; lateral spine on 9th segment 

 very short. 



9. M. amphigena Selys. i Supposition.) 



i )ne nympha. Japan. 



Head broad, concave above; abdomen similar to M. transversa; no dorsal hook on 

 10th segment; lateral spine of 9th segment very short, not exceeding 10th segment; 

 ventral edge of 9th segment hairy. 



