(Pase 33) 

 Their various characters are often uncertain and waning, intermediate 

 forms therefore not infrequent. If one holds that they belong to the 

 same species, D. dentata iravh. the development seems, namely as far as 

 size is concerned, to depend on the host ants. The largest form, D. Ltaer- 

 keli Kiesw. developes and lives with the large wood-ant, Formica rufa , 

 and its forms, while our smallest form, D. Ha^ensi "^asm. , only occurs 

 with the much smaller form, exsecte . Also as far as color is concerned, 

 in Dinarda much correspondance and similarity to the host ants is found, 

 inasmuch as the individuals which live with Formica rufa and ( ruf o-) trunci * 

 cola are lighter than the individuals which are found with Formica (rufo- )- 

 cratensis . 



Key to Species. 



1. Pronotal sides smoothly impressed, its side-margins smoothly rounded. 



L. 4.5-5 mm 1. D. Maerkeli Kiesw. 



Pronotal sides anteriorly foveated impressed, its sides not smoothly 

 rounded 2. 



2. Antennal next-last Joints (7-10) strongly transverse; pronotal sides 



more or less light rust-red. L. 3.r,-4.P, mm.: 2. D . dentata iravh. 



Antennal next-leet Joints (7-lo) feebly transverse; pronotal sides 



broadly light red* L. 3.5-4 mm 3. D. Hagensi "Vasm. 



(Page 34) 



1. C. Maerkeli Kiesw. 



(Kiesv/. Stett. Bnt. Ztg. 1843, 306; Kraatz Ins. ^.. II, 110; Thorns. Skand, 

 Col. II, 245; Muls. et Rey Brevip. 1874, 10; :;anglb. Kaf. M. II, 49). 



Fecognlzed especially by the size, color, and the smooth side-rounding 



-40- 



