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UNITED STATES NATIONAL MUSEUM BULLETIN 224 



spines and the lengthened fore legs, weak or reduced 

 ocellar and scutellar bristles in contrast to the strong, 

 long, numerous bristles placed on these parts in Das- 

 ypogon. On Molobratia teutonus, also, there is a 

 rather conspicuous tuft of small bristles on the third 

 antennal segment, which ends with a sharp, conical 

 microsegment ; posterior cells of wing open, the fourth 

 closed m Dasypogon. Length 20 to 25 mm. 

 face moderately prominent throughout, more so below, 



Head, lateral aspect: Head of medium length, the 

 face moderately prominent throughout, more so below, 

 but never strongly extended or gibbous, and not quite 

 plane in profile. Occiput nowhere prominent, its pile 

 everywhere stiff and bristly in character. Bristles may 

 be restricted to a single row from the middle to the ver- 

 tex, or may constitute a band along the outer half of the 

 occiput from the vertex to the base below. Proboscis 

 stout, laterally compressed, rather pointed and swollen 

 toward the base; the apex and ventral surface bear fine 

 hairs and on the basal half, the sides and base also bear 

 long, fine hail's. Palpus clearly of two segments, the 

 first segment hemicylindrical, excavated, the second 

 robust and attached dorsoapically to the first. Both 

 segments bear numerous, long, bristly hairs. Antenna 

 attached near the upper fourth of the head, moderately 

 elongate, very little if any longer than the total head 

 length; the third segment is longer than the first two 

 combined, sometimes laterally compressed, and gen- 

 erally attenuate apically, with conspicuous, long, dorsal 

 bristles. There is a well developed, pointed microseg- 

 ment with apical spine. 



Head, anterior aspect : The face width below the an- 

 tenna varies from a little less than one-fifth to nearly 

 one-third of the total head width and has either parallel 

 sides, or is moderately divergent below. The face is 

 pubescent, with short or long, stiff but scanty pile over 

 the middle, reaching nearly to the antenna and with 

 slender or moderately stout, long bristles on the lower 

 third. Subepistomal area large, oblique, and concave. 

 The front is rather short, very slightly wider than the 

 upper face, pollinose or bare medially, and character- 

 istically with numerous, long, stout bristles placed la- 

 terally. Vertex at the most shallowly excavated, the 

 ocellarium low but prominent, with three pairs of 

 bristles, some of which may be slender, or all may be 

 stout and at least one pair long; there are sometimes 

 short, postocellar bristles as well. Anterior eye facets 

 slightly enlarged. 



Thorax : Mesonotum low, bare, with scanty fine setae 

 and dense, often bright colored pubescence and some- 

 times with a well developed dorsocentral band of bristly 

 pile, and more scattered acrostical pile. The following 

 complement of bristles present: No numerals, 5 noto- 

 pleural, 5 to 7 supraalar, and 3 to 5 postalar. Scutel- 

 lum either without bristles or pile, or with several pairs 

 of long slender bristles, its disc flattened and pubescent. 

 The pronotal collar bears either moderately stout 

 bristles or bristly pile; the postpronotum is prominent, 

 much higher than and separated from the anterior por- 

 tion by a deep crease, and bears lateral bristles or pile. 



The lateral prothorax has a conspicuous tuft of numer- 

 ous long bristles or pile. Prostemuni dissociated. Of 

 the remaining pleura only the metapleuron bears pile or 

 bristles; it contains a vertical band of scattered bristly 

 hairs. Metanotal callosity micropubescent only. Post- 

 metacoxal area membranous. 



Legs : The legs including both femora and tibiae, are 

 unusually elongate. The anterior basitarsus may be 

 considerably lengthened. The femora are slender, with 

 scattered, fine appressed setae. The hind femur bears 

 quite short, moderately stout bristles, with the following 

 complement : dorsomedial 5 to 7, dorsolateral 5, and on 

 either side below 6 or 7, with a dorsal pair at apex. The 

 hind tibia has somewhat longer bristles, 6 on each of the 

 dorsomedial, dorsolateral, and ventrolateral rows. Tib- 

 ial apex with 12 stout bristles, of which 1 is dorsal, 5 

 medial, and the remainder ventral. Anterior femur 

 with 2 or 3 short bristles at the base anteriorly, 5 or 6 

 posterodorsally, 1 on either side at the apex dorsally, and 

 a few minute bristles posteroventrally. Middle femur 

 with a similar complement and the anterodorsal margin 

 with 6 or 7. The anterior and middle tibiae have 5 or 6 

 slightly longer bristles in each row, and the ventral row 

 of each contains 3 still longer bristles. The protibia has 

 an exceptionally long protuberance extending far be- 

 yond the apex of the tibia and bearing medially a fringe 

 of stout bristles or spinous setae; apex of protuberance 

 with a stout, long or short spine, and this basitarsus 

 with a ventral swelling and small denticles. Claws 

 sharp; pulvillus well developed; empodium strongly 

 swollen at the base. 



Wings : Marginal cell, all the posterior cells, and the 

 anal cell widely open. 



Abdomen : The abdomen is more or less cylindroid, or 

 moderately flattened, the pile reduced to fine, appressed 

 setae throughout and including the lateral margins. 

 Only the first tergite bears bristles ; on each side are 3 or 

 4 pairs of bristles, which are stout, short and sharp, or 

 long and weak. Males with 7 tergites only, the seventh 

 about half as long as the sixth. Females with 8 tergites 

 and the eighth tergite from one-half to one-fifth as long 

 as the seventh. Male terminalia large, fully rotate, the 

 epandrium elongate, conical, large, conspicuous and 

 quite uncleft. The gonopod is moderate in size, some- 

 times with terminal protuberances. Aedeagus simple 

 and fully exposed. Hypandrium small. Female ter- 

 minalia quite inconspicuous, except that the proctiger is 

 moderately large and protuberant. The ninth tergite is 

 short, depressed in the middle, uncleft or very tightly 

 apposed and without spines. The author has dissected 

 females of Molobratia teutonus Linne without finding 

 any evidence of either divided plates or spines. 



Distribution. Palaearctic: Molobratia japonicus 

 Bigot (1878) ; teutonus Linne (1767) [=marmoratus 

 Fourcroy (1785), tetiton Macquart (1834), ftenthre- 

 doides Scopoli (1763)]. 



Engel, 1930, assigns the following additional Palae- 

 arctic species to Dasypogon, of authors, which now be- 

 comes Molobratia: Molobratia arcuatus Fabricius 



