ORJSMOLOGV. 351 



ruinate in the margin. Ex. Tenthredo. PLATE X. 

 FIG. 8. 



b. INCOMPLETE (Incomplete). 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 (Petioktta). When an areolet is con- 



nected with another by a stem like a footstalk 8 . 

 PLATE X. FIG. 8. 



8. RAMULOSE (Ramulosa}. When an areolet sends 



forth a little unconnected branch. Ex. Pompilus, 

 Sphex, &c. b 



9. ANGULAR (Angulatce}. When an areolet juts out 



on one side into an angle from which no nervure 

 proceeds, to form another areolet. Ex. Eri stalls, 

 Cerceris. c PLATE X. FIG. 14. 



10. DIDYMOUS (Didymce}. When areolets are nearly 



divided into two by a nervure. Ex. Gyrosto- 

 ma. 



11. SESQUIALTEROUS (Sesquialterae). When a minute 



areolet is appended to a large one. Ex. Postcos- 

 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. L \.f. 3. b. b Ibid. t. iii. Gen. 4, 5. 



c Ibid, t, x. Gen. 23, 24. d Ibid, t. vi. Gen. 2. 



