1899.] 127 



Scheme of the above Sub-Orders, with their characters : 



4 cubital cellules Only 3 cubital cellules 



present originally present originally 



{Tetrastega). {Tristeffa). 



f « ^ , « ^ Thorax behind 



Trochanters C '^ compressed to a 



1-jointed \ I. Vespoidea. ( point. Abdomen 



{Monotrocha) . (. t petioled. (^Clis- 



r II. IcHNBUMONiDEA. ) togastro) . 



Trochanters \ '\ Thorax behind 



2-jointed 1 1ll. Tenthredonidea > not compressed 



{Ditrocha). (. 3 to a point. Ab- 

 domen sessile. 

 {Chalastogastra). 



As to further sub-division of the Order, Konow approves the decision of the 

 German Zoological Society that Families should have names with the suffix — ida ; 

 but points out that it is still unsettled what groups are to be called Families. In 

 his view this name should be given to the category immediately below that of Sub- 

 Order, so that the generally accepted Families, Apidce, Vespidm, Siricidce, 

 Braconidce, &c., would stand. But he shows that confusion exists in the present 

 practice, e. g., Mr. Marshall uses names in " -idee " for the " Tribes," into which he 

 separates his "Divisions" of the " Braconides." There is a similar lack of uni- 

 formity in the systems of different Coleopterists, Lepidopterists, &c., and Konow's 

 plea for an agi'eement as to this point will probably be felt to be reasonable. 



Below the Families with names in -idee might come, he says, still following the 

 rules of the G-erman Zoological Society, Sub-Families with names (adjectival, 

 subaud. " species ") in -ince. Then for Tribes and Sub-Tribes would remain the 

 names in -ides, -ades, and -ini. Konow is emphatic in contending that all names 

 of categories should by rule be adjectives, and that masculine substantives should 

 not be allowed to appear till the last steps in the process of sub-division are reached. 



Brunswick, Woking : 



November, 1898. 



NOTES ON CEETAIN PAL^AECTIC SPECIES OF THE GENUS 



EEMEROBIUS. 



No. 2—H. MARGINATUS, R. LUTESCENS, H. RUMULI, 



AND H. OROTYPUS. 



BY ROBERT McLACHLAN, P.R.S., &c. 



The four species here considered have two general characters in 

 common, viz., a yellow (or yellowish) longitudinal band on the thorax 

 with dark sides, and a more or less conspicuous black (or blackish) 

 spot on the anterior wings near the base, on a small transverse nervule 

 placed at a point where the area between the lower branch of the 

 upper cubitus, and the upper branch of the lower cubitus, is con- 

 stricted. In form H. orotypus is much more elongate than the others. 

 In general appearance the first three are the most alike, and the last 

 {orotypus) the most dissimilar, whereas, in the structure of the ^ 



