NEW SPECIES OF SOUTH AMERICAN EUMOLPIDiE. 193 



other section, and this difference in the articuhition of the head 

 has never been, in my opinion, sufficiently emphasized in our 

 classification of the orders. It is closely correlated with the 

 decrease, in size, of the prothorax. 



In mouth structure the tendency is all in the direction of 

 galear development in the maxilla, while the lacinia becomes 

 constantly less important. In the Diptera, in which this series 

 finds its highest development, the galea predominate over all 

 other mouth structures. In the Hymenoptera the galea is 

 always most highly developed, and particularly so in the bees, 

 the most completely differentiated of all in the order. In the 

 Lepidoptera the galea alone is developed into a functional organ, 

 and in those net-veined orders in which the mouth parts are not 

 rudimentary merely the galea is at least as well developed as and 

 never subordinated to the lacinia. The orders which I placed in 

 this series are Odonata, Ephemerida, Trichoptera, Mecoptera, 

 Hymenoptera, Siphonoptera, and Diptera. 



[Here follow remarks on the phylogeny of the orders in the 

 third division.] 



I am quite aware that objections may be urged to this 

 scheme, and that it is imperfect in some respects, but so also 

 are all the others that have been proposed ; and I believe, as I 

 look at the matter, that my plan answers more of the objections 

 than any other that I have seen. Nothing known to me con- 

 tradicts it more vitally than any other that has been proposed. 



I have accorded very little place to the character of the 

 metamorphosis, because there is no hard and fast line between 

 complete and incomplete ; but the closer comparative study of 

 early stages will unquestionably help out our future classification. 

 I have not made use of any one character as the basis of my 

 scheme of division, because I do not think nature works in that 

 way ; and, finally, I have used adult stages only, because I see 

 in the adult ready to reproduce, the species. It is the culmina- 

 tion of individual growth, and until it is ready to reproduce it is 

 incomplete, subject to change, and not an expression of the point 

 to which its development has attained. 



NEW SPECIES OF SOUTH AMEEICAN EUMOLPID^. 



By Martin Jacoby, F.E.S. 

 (Continued from p. 170.) 



Chalcophana elongata, n. sp. 

 Elongate, narrowed posteriorly, black, above fulvous with metallic 

 green gloss ; head and thorax sparingly punctured, stained with fus- 

 cous; elytra strongly and closely semi-regularly punctured, the sides very 

 acutely bi-costate, apical angles concave-emarginate. Length 4 lines. 



