MICRORHAGUS. 247 



separation of species. Two important characters have been observed in species described 

 below which would hardly have escaped him had they existed in the then known 

 species. In two of them (M. marcidus and M. protractus) the eyes are much larger 

 than usual, so that the front between them is comparatively narrow; while in three 

 species (M. rujiceps, M. frcenatus, and M. maculicollis) the eyes are distinctly incised in 

 front, as is usual in Entomophthalmus. 



Owing to the great increase of the number of species in our fauna, it has been 

 deemed advisable to present their more striking characters in tabular form to assist in 

 their identification. 



1. Posterior coxal plates distinctly wider internally 2. 



Posterior coxal plates parallel-sided 10. 



2. Metasternal epistema very narrow or partly concealed in front, 



broader behind , 3. 



Metasternal episterna parallel-sided 7. 



3. Outer carina of the juxta-sutural groove entire 4. 



Outer carina of the juxta-sutural groove obliterated behind . . . unicus. 



4. Eyes entire; species pi ceous-black 5. 



Eyes triangularly incised in front 6. 



5. Clypeus nearly as wide at the base as the distance to the eyes ; 



antennae ( $ ) not pectinate sepositus. 



Clypeus very narrow at the base ; antennse ( $ ) pectinate. 



Thorax carinate at the middle near the base . repandus. 



Thorax not carinate, disc less densely punctured intrusus. 



6. Black ; head reddish ; thorax dark brown, with median and lateral 



lines of pubescence more distinct frcenatus. 



Piceous-brown ; elytra indefinitely rufescent at the tip and sometimes 



along the suture rujiceps. 



7. Eyes large, nearly as wide as the front between them 8. 



Eyes small, normal ; thorax bicoloured ; antennse long 9. 



8. Colour rufo-testaceous marcidus. 



Colour piceous-brown ; apical margin of the thorax and the base and 



suture of the elytra red protractus. 



9. Eyes incised in front ; antennae ( $ ) pectinate maculicollis. 



Eyes entire ; antennae ( $ ) serrate. 



Propleurse densely punctate ; outer carina of the groove oblite- 

 rated behind elatus - 



Propleurse sparsely punctate, shining; outer carina of the 



groove entire ; groove very narrow insidiosus. 



10. Outer carina of the propleural groove entire ; elytra reddish-brown . meticulosus. 

 Outer carina of the propleural groove abbreviated behind. 



Elytra red at the basal third humeralis. 



Head and thorax reddish-brown thoracicus. 



