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UNITED STATES NATIONAL MUSEUM BULLETIN 2 24 



tor Kossi (1790), tibialis Fabricius (1794), undulatus 

 Fourcroy (1785)], germanicus helveticm Mik (1864), 

 germanieus melaneurtis Loew (1840), 



The immature stages of egg, larva and pupa have 

 been treated by Ratzeburg (1844), Frisch (1721), and 

 by Melin (1923) , who presumed that he had this genus. 



Genus Epipamponeurus Becker 



Epipamponeurus Becker, Mission Arc. MSridien Amerique Sud, 

 Paris, vol. 10, p. 166, 1919. Type of genus : Epipamponeu- 

 rus americanus Becker, 1919, by monotypy. 



I give below Becker's description in translation : 



Similar to Pamponerus Loew but last segments of abdomen 

 in the female not divided from the preceding segments by form, 

 color and pile. Length 14 or 15 mm. 



These Individuals cannot be placed among any known genera, 

 because of the ovipositor of the females, which, among all 

 genera and subgenera, have a special form, so that one is able 

 to distinguish these genera according to this form. 



The abdomen of the females of the Asilinae is composed of 

 ten segments, of which the last is formed of two apical lamel- 

 lae; the abdomen is divided into the abdomen sensu stricto, 

 and into the ovipositor, which includes, in addition to the apical 

 lamellae, from two to four segments of the abdomen; the seg- 

 ments of the ovipositor are distinguished from those of the abdo- 

 men by the shape (forme), the color and by the absence of 

 pilosity. 



The only neighboring genus is Pamponerus Loew, but, whereas 

 with Pamponerus the segments of the ovipositor are distin- 

 guished by their bareness and by their shape, among the females 

 of our genus it is not the same ; the ovipositor is provided with 

 bristles and hairs as are the other segments of the abdomen. 

 The males have a superior forceps (epipyge) which is composed, 

 like almost all the other genera, of two forceps ; it does not have 

 special characters. The character of this genus is therefore 

 based on the form of the female ovipositor. 



Distribution: Neotropical: Epipamponeurus ameri- 

 canus Hecker (1919). 



Amphiscolops, new genus 

 FlQUBES 347, 760, 2404 

 Type of genus : Asilus mendax Walker, 1857. 



Large, elongate, cylindroid flies with prominent, 

 bristly face and rather densely long, pilose legs. The 

 third antennal segment is slender and bears a long style. 

 Males with a pair of stout, flattened spines or spinous 

 bristles on the lateral margin of the sixth tergite. Re- 

 lated to Pamponerus Loew. Length 25 mm. 



Head, lateral aspect : The head is of normal length. 

 The face is plane on the upper fifth, or only slightly 

 visible; the lower and greater part of the face is 

 prominent and strongly protuberant. Eye recessive 

 anteroventrally only on the lower fifth ; the anterior eye 

 margin is strongly convex, posterior margin nearly 

 plane through the middle. The occiput is only mod- 

 erately developed, obliterated at the vertex and not 

 prominent below ; occipital pile abundant, long, fine and 

 slightly more abimdant ventrally ; bristles begin below 

 the middle of the occiput but are slender; there are 

 present about 25 on each side and the upper 3 are some- 



what more stout, with their apices slightly curved for- 

 ward; middle bristles rather strongly curved down- 

 ward. The proboscis is of medium size, subcylindrical, 

 with low, dorsal, medial ridge; the apex is slightly 

 tapered and bluntly rounded, with fine, apical pile and 

 a number of long hairs ventrally and laterally on the 

 basal half. The palpus is long and bears numerous, 

 long, stilf hairs wliich become bristly at the apex; ap- 

 parently there is a veiy short, basal, semifused, dorsally 

 excavated segment which may constitute a remnant of 

 the basal, palpal segment ; it has pile only below. The 

 antenna is attached at the dorsal fourth of the head ; 

 the first segment is twice as long as the second, the 

 third segment is slightly longer than the second and not 

 quite as wide; it is slightly tapered towards the apex 

 and bears a long, somewhat basally thickened, apically 

 pointed style. The style is nearly three times as long 

 as the third segment. Pile of first segment abmidant, 

 oblique, rather long and stiff and extending from the 

 base to the apex. The doi-sal pile is restricted to the 

 apical half, shorter but rather abundant. Second seg- 

 ment with 8 to 10 black setae both dorsally and ven- 

 trally. The third segment has 2 or 3 setae dorsally. 



Head, anterior aspect: The face below the antenna 

 is about a sixth of the head width and widened below 

 to a fourth of head width. Subepistomal area deeply 

 grooved in the middle, long, conspicuous and every- 

 where pubescent. The face cover is pubescent, without 

 pile, and bears a wide band of numerous, black bristles, 

 slender laterally but very stout in the lower portion of 

 the medial area and across the middle of the epistoraal 

 margin. All the bristles are especially long below; 

 the upper elements are directed forward, the lower 

 ones curved obliquely downward ; sides of subepistoma 

 with slender, weak bristles. There is a very slight 

 divergence of the front above the antenna and a slight 

 convergence at the vertex. Sides of front with about 

 20 long, black bristles. "Vertex deeply excavated ; ocel- 

 lar protuberance low and bears 7 or 8 pairs of long, 

 fine, bristly hail's. Central eye facets strongly enlarged. 

 The anterior dorsal portion of the occiput is anteriorly 

 recessive and bears a medial fissure. 



Thorax: The thorax including the pleuron, is pol- 

 linose. The mesonotal pile is fine, setate and uniformly 

 scattered over the mesonotum ; acrostical elements pres- 

 ent in 2 or more rows ; dorsocentral elements extend out 

 to the lateral margin and beginning at the middle of 

 the mesonotum they form a single, posterior row of 

 bristles of increasing length and stoutness. Humerus 

 pilose. Stout, long, lateral bristles are present and con- 

 sist of 2 notopleural, 1 weak, posthvuneral ; 1 postsu- 

 praalar; 1 weak suprapostalar; 2 postalar, and 1 pair 

 of scutellar bristles. The scutellmn is thick, convex; 

 the surface pollinose with dense, long, fine, stiff pile; 

 margin with deep, impressed rim. All of the propleu- 

 ron bears abundant, long pile ; the pronotum has 4 pairs 

 of stout bristles. The upper border of the mesopleu- 

 ron, its anterior and posterior borders bear long, stiff 

 pile but no bristles; upper sternopleuron with a large 



