Genus DRURYA. 



Drurya, (described as a Section of Papilio) Aurivillius, " Fjarilar fran Gaboon," in the Ent. Tidskrift, p. 44. (Stockholm, 1880) 

 „ Fickert, (characters noticed) Zool. Jahrb. Abth. f. Syst. iv., p. 692. 

 „ Staudinger and Schatz, Exotic Schmetterlinge : Die Earn. und. Gatt. der Tagfalter, text, p. 22., p. 40. Theil 2 (1892). 



6". Antennae of moderate length, and rather more 

 obtuse at their summit than in Papilio. 



Anterior wings : costa much elongated, and sufficiently 

 convex or arched in A ntimachus— -less long and a little 

 more convex in Zalmoxis ; exterior margin strongly con- 

 cave from the terminal of the ist discoidal branch ; the 

 apical angle much rounded and very obtuse ; interior 

 margin nearly a straight line, and incurved towards the 

 base in A ntimachus ; very concave, and less incurved at 

 the base in Zalmoxis ; anal angle slightly rounded. The 

 costal vein is stout and strong: the subcostal from the base 

 is so close to the costal as to appear united with it ; and the 

 ist and 2nd branches of the latter are equally close 

 together nearly along their entire length ; the 3rd 

 branch curves downwards at the apical angle : the 4th 

 and 5th branches bifurcate at a considerable distance 

 from the ist discocellular nervule ; all the branches of the 

 median vein are sequi-distant from each other, the first 3 

 curved irregularly downward at the margin, and the 4th 

 upward ; the median nervure is fairly stout and strong, 

 especially in Zalmoxis ; the submedian nervure is stout, 

 and very concave for a short distance from the base, then 

 more straight to the posterior angle (the convex curvature 

 of the corresponding portion of the interior margin 

 strongly emphasizes the width of space thereby obtained 

 between the vein and the margin in Antimachus.) The 

 interno-median nervure is stout and long, and united as 

 a branch to the submedian [in some Papilios the two 

 appear to be absolutely independent except at the 

 extreme base ; the pseudoneura are obscure, but their 

 position will be seen by reference to Plate II, fig. 5, 

 and PI. Ill, fig. 3] ; discoidal cell long and narrow. 



Posterior wings small in proportion to the anterior in 

 Antimachus (but normal in Zalmoxis) ; rounded, with the 

 costal margin entirely straight — the basal portion with 

 so strong a curvature as to render the wing above the 

 precostal nervure extremely convex in Antimachus — less 

 straight in Zalmoxis ; from the apical to the anal angles 

 the hind margin is rounded, and more or less strongly 

 denticulated in Antimachus ; in Zalmoxis there is a 

 gradual curvature from the costal margin to the anal 

 angle (the apical being lost), and the hind margin is only 

 slightly scolloped ; the inner margin in each species has 

 the normal, almost straight line ; all the veins well ex- 

 pressed — the subcostal, median, and submedian nervures 



fairly robust, especially in Antimachus, — the distance 

 between each nervule being generally nearly equal. The 

 bifid precostal nervure encloses an almost diagonal cell 

 greater than in most of the Ornithoptera, and greatest in 

 Zalmoxis; the discoidal cell shorter, broader, and more 

 unequal in width than on the upper wing, especially in 

 Zalmoxis, as the 2nd division of the subcostal vein is 

 strongly incurved just beyond its ist branch ; the pseu- 

 doneurus is very strongly expressed in Zalmoxis, and 

 starts as a short stem at the base of the cell, then 

 branches off, the 2nd and 3rd branches to the entire length 

 of the cell, the ist being only a few millimetres long; in 

 Antimachus the pseudoneurus runs from the base of the 

 cell nearly half way, when it branches off, — the first 

 branch short, and terminating nearly midway of the 2nd 

 division of the subcostal nervures,— the 2nd reaching the 

 2nd discocellular nervule, with a short (or 3rd) branchlet 

 in some specimens near to the end of the cell. 



Head broader in Zalmoxis than in Antimachus, palpi 

 very short, and hidden by the rather long pointed, and 

 prominent tuft of hairs in Antimachus— less pointed and 

 obtrusive in Zalmoxis ; haustellum partially concealed by 

 tuft of hairs in Antimachus, less so in Zalmoxis ; eyes rather 

 smaller in Antimachus than in other genera ; thorax about 

 normal in size and form ; legs, with their femora more 

 equal in length than in some genera. 



Abdomen long and graceful in Antimachus, shorter 

 and rather stouter in Zalmoxis ; anal valves smaller in 

 proportion than in other Genera. 



? . [Antimachus] Considerably smaller than the <? . 

 Anterior wings with costa slightly straighter than in the 

 <? , and posterior margin less concave ; in all other re- 

 spects the same as in the $ . Posterior wings similar in 

 character to those of the S . Head and thorax similar 

 to $ . Abdomen shorter, more robust, less graceful ; anal 

 segment obtuse, and anal tuft inconsiderable. 



Type of the Genus, 0. Antimachus. [It may be 

 necessary some day to regard Zalmoxis as the type of a 

 subgenus.] 



The general appearance of both sexes, but especially 

 of the ? of Antimachus, is that of an abnormally large 

 Acrsea. 



Vol. I. 



