BUGS, &c. MIMICKING ANTS 



255 



was sent from Rosako, Usaramo, August, 1888, as 'an 

 ant', together with two undoubted species of these Hymeno- 

 ptera (Polyrrhachis gagates and Ponera tarsatd). The 

 resemblance between the former species of ant and the 

 Hemipteron, Gerstaecker describes as strong enough to be 

 deceptive. 1 It is principally brought about by the short 



Fig. 3. 



Fig. 4. 



Fig. 3 (x 3). — An ant-like East- African Hemipterous insect, Myrmoplasta mira 

 (Gerst.), seen from above and from the left side. (From Gerstaecker, 

 Article 6, Hemiptera, p. 9, in Fr. Stuhlmann's Zool. Ergeb. 1888-1890, 

 Bd. I. Berlin, 1 893.) 



Fig. 4. — An ant-like N.-American beetle, Euderces picipes, Fab., seen from above 

 and from the right side. 



globular abdomen, united to the thorax by a constricted 

 portion, well seen in the side view represented in Fig. 3. 

 Among Coleoptera the resemblance to ants is very 

 common. I select as an example a little Longicorn 

 {Euderces picipes^ Fab.), which I found very abundantly 

 upon the heads of Umbelliferous plants at Pine Lake, Hart- 



1 Zool. Ergeb. einer Reise in Ost-A/rika, Fr. Stuhlmann, Bd. I ; 

 Article 6, Hemiptera, p. 9: Dietrich Reimer, Berlin, 1893. 



