OCHTHERA. 161 



2. O. mantis DEO. and 9. Pedes nigri, tibiis intermediis non 

 dilatatis, tarsorum intermediorum basi rufa, metatarso postico modice 

 incrassato. 



Legs black ; middle tibiae not enlarged, middle tarsi red at the base, first 

 joint of the hind tarsi only little swollen. Long. corp. 0.24 0.25. 

 Long. al. 0.2. 



I am quite unable to distinguish this species, so common in the 

 Middle States of the Union, from the European Ochth. mantis. 

 It is true, indeed, that in most American specimens the eyes are a 

 little more distant from each other than in the European; but this 

 difference in some cases disappears entirely ; nor do the European 

 specimens altogether agree in this respect. The color of the face 

 is likewise as variable as in the European specimens. As mark- 

 ings, distinguishing this species from the two next ones, which 

 resemble it very much, the following may be noted : The ground 

 color of the legs, in well-colored specimens, is black, only the mid- 

 dle tarsi being red from their base for a very variable extent. The 

 middle tibia3 are considerably narrower than in Ochth. rapax and 

 tuberculata, and entirely dusted on their anterior side; the first 

 joint of the hind tarsi is very little swollen and rather long. 



Hab. Middle States. (Osten-Sacken.) 



3. O. tuberculata LOEW. $. Pedes nigri, tibiis intermediis subdila- 

 tatis, tarsis omnibus obscure rufis, metatarso postico nigro, valde incras- 

 sato. 



Legs black ; middle tibiae a little enlarged ; all the tarsi dark red, the first 

 joint of the hind tarsi black and very much swollen. Long. corp. 0.18. 

 Long. al. 0.17. 



Very similar to Ochth. mantis, but its face is considerably nar- 

 rower in its upper part, and the elevation in the middle of it forms 

 more distinctly a small double knob. The middle tibiae are broader, 

 on their outer edge sharper, and polished on a great part of its 

 anterior side ; the knees .of the hind legs and all the tarsi brown- 

 ish-red, the last joint of the latter more brownish; the first joint of 

 the hindmost tarsi black, much swollen. 



Hab. Illinois. (Schaum.) 

 11 



