572 



UNITED STATES NATIONAL MUSEUM BULLETIN 224 



Distribution: Nearctic: Tolmerus annulipes Mac- 

 quart (1838) ; a7ii!2macAws Walker (1849) ; callidusWil- 

 liston (1893) ; delusus Tucker (1907) ; johnsoni Hine 

 (1909) ; tnaneei Hine (1909) ; mesae Tucker (1907) ; 

 noto^MS Wiedemann (1828) [ = aZe^Aes Walker (1849)]; 

 novae-scotiae Macquart (1847): paropus Walker 

 (1849) {= prospectus Tucker (1907)]; prairiensis 

 Tucker (1907); sadyates Walker (1849) i = tiUalis 

 Macquart (1834)]; snoioii Yin\& (1909) [ = annulatus 

 Williston (1893)]. 



Neotropical: Tolmerus alterus Williston (1901). 



Palaearctic: Tolmei^s albiceps Becker (1923) ; auri- 

 mystax Bromley (1928) ; corsicus Scliiner (1867) 

 { = vet^iicularis Pandelle (1905)]; cyrnaeus Oldroyd 

 (1946) ; diagonalis Pandelle (1905) ; eximius Becker 

 (1923) ; facialis Becker (1913) ; ferox Becker (1923) 

 fiavibarlatus Becker (1914) ; illucens Becker (1923) 

 impiger Becker (1923) ; incommunis Becker (1923) 

 lesinensis Palm (1876) ; novarensis Schiner (1868) 

 paganus Becker (1923) ; pauper Becker (1923) ; per- 

 fectus Becker (1923) ; plant fades Becker (1923) ; poeci- 

 logaster Loew (1849) ; pyragra Zeller (1840) ; senex 

 Wiedemann in Meigen (1820) ; tessellatus Loew 

 (1849); trifissilis Seguy (1929); ventriculus Becker 

 (1923). 



Ethiopian: Tolmerus comans Oldroyd (1940) ; gym- 

 nus Oldroyd (1939) ; hirsutus Eicardo (1922) ; jiixta 

 Oldroyd (1939) ; nigripes Eicardo (1922) ; pammelas 

 Speiser (1910) ; ruhripes Eicardo (1922). 



Oriental: Tolmerus agilis Wiedemann (1828) ; angu- 

 laris Eicardo (1922) ; asiaticus Becker (1925) ; hata- 

 viensis de Meijere (1914) ; impeditus Becker (1925) ; 

 incisularis Bromley (1935) ; nicoharensis Scliiner 

 (1868) ; parvus Eicardo (1922) ; punjahensis Bromley 

 (1935). 



Malloch (1917) discusses immature stages of Tol- 

 merus notatus, an American species. 



Genus EpitriptMs Loew 



FlQUKES 368, 736, 1526, 1535, 2307, 2318, 2391, 2394 



Epitriptus Loew, Linnaea Entomologica, vol. 4, p. 108, 1849. 

 Type of genus: Asilus cingulatus Fabriclus, 1781. Desig- 

 nated by Coquillett. 1910. The first of 6 species. 



Epitreptus Walker, List, . . . dipterous insects . . . Britisli 

 Museum, suppl. 3, p. 676, 1855, lapsus. 



Small, dark flies often yellowish grey pollinose; the 

 legs may be marked with yellow or red. Closely re- 

 lated to Machimus Loew, of which it is perhaps only 

 a subgenus, containing about 21 species. Species of 

 Epitriptus have strong, bristly hairs on the sternites; 

 the tergites have postmarginal bristles. The male ter- 

 minalia are small, moderately long and apposed ; there 

 is no ventral process from the eighth stemite. Female 

 ovipositor compressed with free proctiger. Only the 

 lower half of the face is protuberant. Length 10 to 

 14 mm. 



Head, lateral aspect: The face is moderately de- 

 veloped and gibbous on the lower three-fourths and 



nearly plane with the eye on the upper fourth. Eye 

 of moderate length, strongly convex anteriorly and 

 distinctly recessive below. The occiput is of moderate 

 thickness throughout, the pile long, fine, curled and 

 abundant on the lower half giving way in the middle 

 to 7 or 8 pairs of slender, pale bristles and on the upper 

 sixth to about 6 pairs of stout, black bristles situated 

 immediately beliind the posterior eye comers with an 

 additional stout, black bristle behind the vertex. The 

 proboscis is short and stout, distinctly swollen toward 

 the base both in lateral and dorsal aspect; there are 

 several long, fine hairs vent rally on the basal half and 

 the apex is obtusely romided; a low dorsal medial 

 ridge is present. Palpus slender, cylindrical, composed 

 of one segment with several, strong, apical bristles and 

 a few additional, exceptionally long, bristly hairs, ex- 

 cept medially. The antenna is attached at the upper 

 third of the head and compartively long and slender; 

 the first segment is l^^ times as long as the second. The 

 third segment is nearly as long as the combined length 

 of the first two, and bears a short, distinct microseg- 

 ment followed by a short, thick style carrying an apical 

 spine. The microsegment is three-fifths as long as the 

 third segment; the first antennal segment bears nu- 

 merous, bristly hairs laterally, 1 or 2 dorsally and a 

 single, quite stout, long, black, ventral, oblique bristle; 

 second segment with only very short setae. 



Head, anterior aspect : The head is very little wider 

 than high. The face below the antenna is a fifth the 

 head width and divergent below. The face is micro- 

 pubescent with 12 strong, long, black bristles wliich 

 extend along the lateral margins of the gibbosity and 

 extend up to the upper edge of the gibbosity; the 

 lower elements are more slender. Center of face with 

 8 to 10 pairs of stout, pale bristles; black and pale, 

 slender bristles are continued down along the sides of 

 the subepistoma. Subepistomal area rather large, ob- 

 lique and nearly plane. The front is pubescent, with 6 

 pairs of slender, bristles laterally, the sides divergent 

 in the middle, convergent again at the vertex. Vertex 

 strongly excavated, the ocellarium low, with 2 pairs of 

 obliquely placed, moderately strong bristles between the 

 ocelli, 1 pair between the posterior ocelli, and a short 

 bristle behind the ocelli. Central eye facets strongly 

 enlarged. 



Legs : The anterior and middle femur distinctly swol- 

 len, especially towards the base; liind femur very 

 slightly swollen throughout the middle to near the apex, 

 dorsal pile of this femur dense, appressed and setate, 

 with more scanty, fine, erect pile below and a moder- 

 ately abundant ventromedial fringe of long, fine hairs. 

 Hind femur with 3 bristles, 1 just beyond the middle, 

 1 at the apical sixth and 1 weak element subbasally, 

 and an additional element dorsomedially at the apex 

 and 2 dorsomedial bristles near the apex. Hind tibia 

 with 1 stout, dorsal in the middle, 4 dorsolateral, 2 ven- 

 trolateral at the middle and outer third; apex with 1 

 dorsomedial, 1 dorsolateral, 2 lateral, 1 ventrolateral, 3 

 ventral, and 1 medial ; a brush of setae begins near the 

 base. Middle femur with 1 very stout, long, anterior 



