174 o. W. KIKKALDY, PTILOCEIU'S ÜCIIliACKlS MÜ>;TA>^D0N. 



which is densely so. The hind tibiae are thicker than in the 

 adult and lack the tuft, though tubercles are present (see note). 

 The usual stink orifices are three in number, and minute. 

 The tvichorae is much as in the adult. The abdomen is wide 

 as also the uropleurites, the spiracles large and located veu- 

 trally on the uropleurites, close to the sternites, about the 

 middle of the segment. Tarsi bisegmentate, the first segment 

 short. 



In the Reduviidae, which, as a rule, live by rapine, the 

 protective stink glands have become more er less obsolescent, 

 but in this subfamily, the members of which lure their prey 

 to destruction by scent and taste, a secondary stink-gland, 

 has been formed, separate in origin from the metasternal 

 glands ^). 



Honolulu. December 1909. 



EXPLANATION OF FIGURES. 



Fig. 1. Ptilocerus ochraceus Mont., adult 5, dorsal view. 



» 2. The same, ventral view. 



» 3. The same, ventral view showing trichome in a. 



» 4. The same, in profile. 



» 5. a and b. Egg. 



» 6. Reticulated surface of egg-choriou, 



» . 7. Larva, dorsal view. 



» 8. Abdomen, ventral view; «, adult ç, b adult d". 



') The male and female adults sliuw some difference in the form of the 

 abdomen. As indicated in fig. 8 the $ has a mucli lai'ger abdomen, of which 

 5 segments are plainly visible, where as the sixth segment is almost entirely 

 concealed. With the male however the sixth segment is broadly visibly. Also 

 the (ƒ has on each of the segments 1 — 4 a deep narrow median and keeled 

 groove, wliish in tlie 9 '^ only indicated by a slight linear depression. 

 (Fj. Jacob.-on\ 



