1915]. 271 



greatly, 2 — 3| mm. long. The hind angles of the thorax are more 

 definite than in the allies, and the elytra more narrowed towards the 

 tips than in H. fallax ; the coarse sculpture of the elytra is markedly 

 crenate, and the interstices differ but little from one another. On the 

 upper side the lateral margin of the elytra stands out less than in the 

 allies, but the flanks are quite visible on the under-surface. Colour 

 very variable. 



Aedeagus short, median lobe broad, lateral lobes rounded ex- 

 ternally, with slender and pointed tips. 



The variation does not appear to be local, as very different in- 

 dividuals are found together. It is probably to some extent sexual, 

 the female being larger and broader, with more sculpture on the 

 thorax, and slightly shorter palpi. 



The species is widely distributed from Scandinavia to Orenburg, 

 but there are no southern records. In Britain it has not been found 

 farther north than Lincolnshire. 



6. — Helophorus croaticus Kuwert. 



This was considered by Kuwert to be a variety of H. strigifrons, 

 but it has been separated by Ganglbauer and Zaitzev. 



The single example before me is very distinct from strigifrons. 

 The palpi are unusually short for this group, yellow ; head small, 

 channel of vertex rather broader than usual ; thorax not so convex, 

 strongly transverse, coarsely granulate ; elytra testaceous, much varie- 

 gated with black, sculpture coarse, lateral margin rather strongly set 

 out ; flanks of elytra quite visible beneath ; legs pale red. 



Moravia (Eeitter in coll. Champion) . 



This sj)ecies in the form of the thorax, shorter palpi, and deeper 

 channel of the vertex makes some approximation to the aeneipennis 

 group. 



7. — Helophorus crenatus Rey. 



H. crenatus Eey, Rev. ent. franc, iii, 1884, p. 268 ; ? Key, Col. 

 Fr. Palp., 1885, p. 168. 



Rey, in 1884, when he proposed this name, gave no description. 

 All he said is as follows, translated : " Helophorus crenatus Rey : This 

 species is near to strigifrons and planicolUs Thomson. It is less com- 

 pact in form than the former, and has the sides of the thorax more 

 curved. It differs from the second by the channel of the vertex not 



