On Tleterocern from Cosla Rica. 173 



J'ir/. 5f. Crotchet or hook of the foregoing. X Zeiss oc. 2, obj. D. 



I^iff. 6 d. Fortieth foot of the same. Enlarged. 



Fig. 5 e. Dorsal crotchet of the fortieth foot. X Zeiss oc. 2, obj. D. 



Fif). 6 a. Bristle of Chcetozone Z. X Zeiss oc. 4, obj. D. 



Fig. 7. Head and anterior region of Cirratulispio. Enlarged. 



Plate VII. 



Fig. la. Bristle from the seventh foot of Cirratulispio. X Zeiss oc. 4 

 obj. L>, with full draw-tube. 



Fig. 7 b. Crotchet from the first segment of the second region of the 

 foregoing. X Zeiss oc. 4, obj. D. 



Fig. 8. Bristle of Chcetozone I., Canada. X Zeiss oc. 4, obj. D. 



Fig. 9. Anterior bristle of Chcetozone setosa, var. canadensis, from the 

 tenth foot, x Zeiss oc. 4, obj. J). 



Fig. 9 a. Posterior hook (crotchet) of the same. X as above. 



Fig. 9 b. Capillary bristle alternating with crotchets. X as above. 



Fig. 10. Bristles of Chcetozone whiteavesi. X Zeiss oc. 4, obj. D. 



Fig. 11. Hook of Chcetozone setosa, var., from Norway, x Zeiss oc. 4, 

 obj. D. 



Fig. 12. Tip of tail of Cirratulns norvegicus, unfortunately from a speci- 

 men not quite complete. 



Fig. 12 a. Bristles of the foregoing. X as above. 



XVIL — New Specie.'i of Heterocera from Costa Rica. — V. 

 By W. SciiAUS, F.Z.S. 



Syntomidse. 



Isanthrene monticola, sp. n. 



Antennae with the shaft black on basal half and at tips, 

 otherwise white. Body ochreous ; palpi tipped with black ; 

 black spots on tegulse, five on thorax ; black line on shoulders; 

 dorsal and lateral black spots on basal segment of abdomen, 

 followed by black intersegmental spots on other segments. 

 Wings hyaline, the margins ochreous. Fore wings : the 

 veins ochreous, partly irrorated with black ; black streaks at 

 base of costal and subcostal veins ; apex and tornus more 

 broadly ochreous, inwardly edged with black. Hind wings : 

 the veins and inner margin finely black. 



Expanse 34 mm. 



Bab. El Sitio. 



Sarosa mora, sp. n. 



Antennae black tipped with rufous. Body black ; some 

 blue on frnns; whitish-yellow spots on tegular outwardly 



