139 



3. Ithamar liawaiiensis varies in form and colour in the 

 stages, and in one or more stages is particoloured bristly. 



4. Bhopaliis hyalinus shows the inadequacy and inaccuracy 

 of the old character for separating the Lygaeidae from the 

 Greocoridae, viz., "Supericornes" and "Infericornes." In the 

 nymphs of Bhopalus, the antennae are inserted on a line 

 between the eyes and the apex of the head, and the same is the 

 case in the adults, in some of which indeed, they are below the 

 line. The proper character lies in the tegminal venation. In 

 the former there are many veins, at least 8, in the membrane ; 

 in the latter, not more than five (^). 



In B. hyalinus, the early nymph stages have a blood-red 

 ground colour, but in the fourth or fifth, the nymphs are green- 

 ish testaceous, with dark markings, etc. ! 



4. The collar in certain Geocorids is present in the nymphs 

 as well as in the adults, affording apparently a good group- 

 character. 



5. The labium in young nymphs is of the very long, appar- 

 ently gradually shortening. The truth is that the abdomen in 

 particular expands and lengthens, while the labium remains 

 almost stationary. 



The following forms are considered at more or less length: 



Cimicidae : 



1. Oechalia grisea. (fig. 1) 



2. Coleotichus blackburniae. (figs. 2-4) 



3. Geotomus pygmaeus. 



Lygaeidae : 



4. Rhopalus hyalinus. 



5. Ithamar hawaiiensis. 



Geocoridae : 



6. Orthoea pacifica. 



T. Clerada apicicornis. 



8. Nysius vinitor. 



9. N. delectus. 

 10. Metrarga nuda. 



(8) The Neididae, treated either as a separate family or as a subfamily 

 of the Lygaeidae, are rightfully a subfamily of the Geocoridae. On the 

 other hand, the Pyrrhocoridae, sometimes ranked as a subfamily of the 

 Geocoridae, are more closely allied to the Lygaeidae. Many authors 

 persist in terming the Geocoridae, " Lygaeidae," although they do not 

 contain the genus Lygaeus F. (= Hoplopterna Stal). Lygaeidae Kirk- 

 aldy = Coreidae auctt. Geocoridae Kirlmlcly = Lygaeidae auctt. 



