ORISMOLOGY. 351 
minate in the margin. — Ex. Tenthredo. Plate X. 
Fig. 8. 
b. Incomplete (Incompletes). Open areolets that ter- 
minate short of the margin. — Ex. Apis. 
6. Radiant [Radiantes). When a small roundish areo- 
let is a centre from which several long ones di- 
verge. — Ex. Stratyomis. Plate X. Fig. 15. 
7. Petiolate [Petiolatce). When an areolet is con- 
nected with another by a stem like a footstalk a . 
Plate X. Fig. 8. 
8. Ramulose (Ranmlosce). When an areolet sends 
forth a little unconnected branch. — Ex. Po?npilus 1 
Sphex, &c. b 
9. Angular (Angulatte). When an areolet juts out 
on one side into an angle from which no nervure 
proceeds, to form another areolet. — Ex. Eristalis, 
Cerceris. Plate X. Fig. 14. 
10. Didymous (Didymce). When areolets are nearly 
divided into two by a nervure. — Ex. Gyrosto- 
ma. 
11. Sesquialterous (Sesquialtera?). When a minute 
areolet is appended to a large one. — Ex. Poslcos- 
tal areolet of Hylotoma d . 
* Areolets of the Costal Area. 
1. Costal (Costales). Areolets, one or more, below 
the stigma. Plate X. Fig. 14, 15. a, b. 
2. Postcostal (Postcostales). Areolets, one or more, 
above the stigma. Plate X. Fig. 8, 9. a, b. 
* Jurine Hymenopt. t. \.f. 3. b. b Ibid. t. iii. Gen. 4, 5. 
c Ibid. t. x. Gen. 23, 24. d Ibid. t. vi. Gen. 2. 
