718 SUMMARY OF CURRENT RESEARCHES RELATING TO 



group are more variable and slightly less correlated than those of the 

 long-winged group. Undoubtedly short-wingedness is the newer con- 

 dition, and a degeneration. The greater variability and lesser correlation 

 may be connected with this fact, but cannot be explained by it. The two 

 groups are within themselves built upon much the same structural plan, 

 as shown by the regression lines. Wing-length, both with regard to the 

 relative abundance of the dimorphs, and the length of the wing of one 

 of them, seems to be influenced by climatic differences ; but the climatic 

 influences are often weaker than local environmental factors. A study 

 of the variations and correlations of the genus as a whole indicated 

 that local populations are selected examples of it, having different con- 

 stants but following the same laws of relative variability and correlation 

 of organs. " Species " within this genus is a question of fluctuating 

 variability, and only in one organ, conspicuous but relatively unimportant, 

 do we find a clear case of mutation. 



The above are the general conclusions arrived at by the investigator ; 

 the detailed measurements on which they are based are appended to the 

 paper in a series of ninety-three tables. 



Amphibious Cockroaches.* — R. Shelford describes Epilampra annan- 

 dalel sp. n., which can swim on the surface of the water. He has also 

 notes on larval forms — probably of a different species — from under 

 stones in a jungle stream. These showed an adaptation to aquatic life, 

 previously described in similar larva? from Borneo, namely, that the 

 terminal abdominal spiracles are situated at the base of two tubes 

 projecting from below the seventh abdominal tergites. 



/8. Myriopoda. 



Taxonomy of Himantariidse.t — J. Chalande and H. Ribaut discuss 

 this family of centipedes, which includes forms with the following 

 characters : — the mandibles have several pectinate blades and a dentate 

 blade ; the labrum is well developed and made of one piece ; the bases 

 of the first maxilla? are always fused. The following tribes and genera 

 are recognised : — 



I. Himantariini (Himantarium and Pseudohimantarium g. n.). 

 II. Haplophilini (Himaiitariella g.n., Meinertophilus, HaplopMlus, 

 and Stigmatog aster). 



III. Bothriogasterini {Bothriog aster and Polyporogaster). 



IV. Mesocanthini (Mesocanthus). 



But the authors hint that three genera might suffice — Himantarium, 

 Himantariella and Stigmatoff aster. 



' Vega ' Myriopods.J — Carl Graf Attems reports on the Myriopods of 

 this famous expedition (1878). The collection includes forty-two 

 species, of which sixteen are new, and five' new genera are established : — 

 Kopidohdus and Karteroiulus (Protoiulidaa, Paraiulinas), Fusiulus 

 (Deuteroiulidae), Ktenostreptus (Spirostreptidse), and Orsiboe (Siphono- 

 phoridas). 



* Records Indian Museum, iii. (1909), pp. 125-7 (2 figs.), 

 t Arch. Zool. Exper., i. ser. 5 (1909) pp. 197-275 (54 figs.). 

 X Arkiv f. Zool., v. (1909) No. 3, pp. 1-84 (5 pis. and 27 figs.). 



