XXXI, 20j 



ENTOMOLOGICAL NEWS 



257 



Double cells between Rs and Rspl, front wings, o 11.11%, r 11.11%, 



2 22.22%, 3 22.22%,, 4 30.54%,, 5 2.77%o (0 97-03 %o, I 2.94%,); hind wings 

 036.11%,, I 1944%. 2 16.66%, 3 13-88%, 4 13-88% (o 100%). Margi- 

 nal cells between Rs and il/3, front wings, 17 13.88%, 18 22.21%, 19 

 30.54%, 20 16.66%, 21 2.77%, 22 8.33% (13 5-88%, 14 14.7%, 15 

 5.88%, 16 47.05%,, 17 20.58%c, 18 5-88%o)- Marginal cells between 

 M4 and Cui, front wings, 4 36.1%, 5 36-1%, 6 13-88%, 7 8.33%, (2 5-88%, 



3 52.94%o, 4 38-23%>, 5 2.94%)- 



Fig. I. \'entral view, apex of abdomen S. nigrocreatum, cf . no. s. Volcan Poas, alt. 2500 



m., April 21, 1916, X. Alfaro. Camera lucida, card at stage level, Zeiss stand, comp. 



micros, oc. 2, obj. A, lower lens off. 

 Fig. 2. Ventral view, apex of abdomen 5. illolum intermediate between subspp. virgula 



and gilvum, c?, no. 53, Cartsgo, February 19, 1910, Calvert. Same lens and camera 



lucida outfit. 



cT. Inferior denticles of the superior appendages, viewed from below, 

 tending to form a reversed curve as shown in text figure i (line of denti- 

 cles almost straight, see fig. 2) and occupying .28-. 416, average .353 

 (.409-. 532, average .461) of the total length of the appendage as meas- 

 ured in profile. 



Inferior appendage .89-1.11 mm. (.89-1.04) wide at base, average i 

 mm. (.96), .30-. 44 mm. (.22-. 30) wide at apex, average .37 (.28) mm. 

 Ratio of apex width to base width .333--435 (-229-. 337), average .368 

 (-295)- 



Locality. Poas Volcano, Costa Rica, 2600 metres [8530 

 feet], April 21, 1916, by Professor A. Alfaro. 12 cf, 8 9 



