RiiizopiTAaus. 449 



hrown-red, with ])lack knoh ; le^-.s rust-red, with brown 

 femora. Tliorax not longer than broad, angles ronnded, 

 punctuation rather close and fine. L. 1| 1. Rare. 



B. coeruleipennis, Sahl. 



BYTUMIDES. 



Mandibles with several blunt teeth before apex ; last joint 

 of maxillary palpi gradually narrowed, apex truncate ; 

 nientum slightly emarginate in front, anterior angles acute ; 

 ligula emarginate in front ; last joint of labial palpi long 

 oval. Antennae with eleven joints, club three-jointed. 



Byturus, Latr. 



Hyturus. 



A, Thorax much broader than long, posterior angles obtuse. 



Rrown-red; head and under-side (except apex of abdomen), 

 and often thorax pitch-brown, with rather long yellowish - 

 gray pubescence. Eyes large and moderately prominent, 

 posterior tibiae of male with fine bristles. L. If — 2 1. 

 Common. B. samhuci, Scop. 



1>. Thorax not much broader than long, posterior angles 

 right angles. 



Rather narrower than B. samhuci ; eyes distinctly smaller 

 and more convex, pubescence rather finer and shorter. 

 Posterior tibiae of male without bristles. L. 1| — If 1. 

 Common. B. tomentosus, Fab. 



TJiOGOSITTJDAE. 



A, Inner lobe of maxillae very small, scarcely perceptible. 



a. Eyes round. 



Antennae with ten joints, club three-jointed. Forehead 

 projecting above labrum, divided by a longitudinal furrow ; 

 ligula strongly emarginate. Tibiae bare, anterior pair with 

 one hooked apical spine. Body very long, narrow, cylin- 

 drical. Nemo soma, Latr. 



b. Eyes kidney-shaped, transverse. 



Antennae with eleven joints, apex gradually and not 

 strongly thickened. Forehead even ; ligula entire. Tibiae 

 bare, anterior pair wdth both apical spines distinct, one of 



G G 



