'ial)tix. 



ADEI'lIAGA. 



189 



I. Wiiifj^; of nioia^tornum very slender. 



i. Di-sp of c'lytni with yellow bands and 



ni:ii-kin<^s .....' A. abbrkviatus, F. 



ii. Disc of elytra unicolorous .... A. yESlOKALlS, Prt^yA:. 



II. Winers of uietasturuum moderate or rather 



lai-tro. 

 i. ]\lalc with a scries of striic forinins a 

 stridulatinp;' file on each side of the third 

 abdominal se;,'mcnt; npper surface dark 

 bronze. 



1. Form narrower ; elytra parallel-sided A. Affinis, Pay^. 



2. Foi-m broader ; elytra with sides 



sliuhtly rounded .A..UKGUICULAEIS, Thorns. 



ii. i^. ale wit iiout stridulatory organ ou the 

 third abdominal sej^nient. 



1. Upper surface black, strongly and 



coarsely reticulated. 



A. Upper surface with strons: distinct 

 scratches forming a longitudiiui] re- 

 ticulation. 



a. I>. iJ-10 nun. ; base of thorax 



slightly sinuate in middle ... A. BTPrsTULAxrs, L., and v. SoUeri, 



Aube. 



b. L. 6-7 mm.; base of thorax trun- 

 cate A. STRIOLATUS, Gyll. 



B. Upper surface with strong scratches 

 forming a coarse reticulation with- 

 out any defiuite direction .... A. MELANAEius,^«5(.' (^arsa^tw, Zett.). 



2. Upper surface very smooth, uni- 

 colorous reddish brown ; swimming 



legs short and stout A. BRUNNE0S, F. 



3. Upper surface very smooth, brownish 

 testaceous, clouded with more or less 



well-defined dark markings and spots. 



A. Femora entirely testaceous; disc of 

 thorax with two black spots (which 



are rarely obsolete) A. Kebulostts, For.it. 



B. Femora brownish towards base ; 



disc of thorax always without spots . A. conspkusus, Marsh. 



4. Upper surface brownish or blackish 

 bronze, smooth and shiny, with a yellow 

 spot on each elytron just behind middle, 



and sometimes anotlier at ajjcx. 



A. Flytral spot behind middle waved ; 

 hind cox;l' rather large; wings of 



metasterimm large A. didtmus, 01. 



B. Elytral spot behind middle simple, 



sometimes indistinct. 



a. Base of thorax sinuate in middle, 

 sides converging from base to front; 

 male with anterior claws distinctly 



toothed A. BIQUTTATUS, 01. {llitidus, F.). 



b. Hase of thorax straight, sides 

 not converging before anterior 

 tliird ; male with anterior claws 



simple A. GUTTATUS, P'll/k. 



5. Upiier surface unicolorous bronze, 

 with at most extreme edges of elvtra 



