10 



As can be seen from the above synonymy the species has evidently 

 been hard to place generically. In our opinion Kirby has come closest 

 to the mark in consigning it to Macrothylacia ; it differs, however, 

 from rubi, the type of this genus, in the long stalk to veins R^ and R.-, 

 of primaries and the short stalk to AL and M;, of secondaries ; the eyes 

 are also larger and more scantily haired. 



The species appears subject to very little variation, judging by 

 the 4 pairs before us, and except in size the two sexes are practically 

 identical. 



The larva, described by Salle, is said to feed on the Guayava 

 (Psidium). 



Habitat; — Arizona (rarely); Mexico; GuATEMAL.^. 



GENUS CALOECIA n. gen. (Type juvenalis B. & McD.) 



Eyes moderate, sparsely haired ; palpi stout, porrect, extending slightly be- 

 yond front, but forming no conical projection ; antennae bipectinate, pectinations 

 in $ sex very large ; fore tibiae in $ with well developed epiphysis, wanting 

 in 9 ; abdomen projecting slightly beyond secondaries, tufted in $ sex ; pri- 

 maries with costal margin rounded at apex, outer margin rather straight, un- 

 dulate, vein Ri from near base, R; and R, stalked, both terminating close to apex 

 of wing. Ri from behind apex of cell. Rr. and M, connate from apex, M-j and M^ 

 from lower angle of cell, Cui from well behind angle, Cu; from a point oppo- 

 site Ri; traces of ist anal vein present. Secondaries with undulate margin; 

 intercostal cell well developed, with one spur ; veins S. C. and Ri from apex ; 

 Ml parallel to costal margin ; M: and M.i connate from lower angle of cell ; Cui 

 from slightly behind angle ; Cu- halfway between base and angle of cell. Sexes 

 slightly dissimilar in color. 



Most closely related to Qtiadrina Grt. with which it agrees in 

 having M^ and 1\L, of secondaries connate ; the intercostal cell is, how- 

 ever, much smaller, and veins R„ and R., of primaries terminate close 

 to apex of wing, whereas in Quadrina R„ is remote from same. We 

 have included dcnda Druce and vcncrabilis H. Edw. in this genus, al- 

 though in both these species R. terminates at apex and R^, on outer 

 margin shortly below apex, a slightly different position to that ex- 

 hibited in the generic type. In other respects, however, the species 

 show marked resemblance. 



C. JUVENALIS B. & McD. (Plate III, figs. 5 and 6.) 

 Dendrolimus juvenalis Barnes & McDunnough. Jour. N. Y. Ent. Soc. XIX, 

 82 (1911). 

 Habitat : — Arizona. 



