448 



UNITED STATES NATIONAL MUSEUM BULLETIN 2 24 



paralobi borne by superior forceps and reduced 

 to a single pair of smooth prongs. 



Heligmoneuea Bigot 

 134(133). Male genital cavity enlarged with extensive, free, 



open space 135 



Male genital cavity small, tightly enclosed. Fe- 

 male eighth sternite along posterior margin with 

 an exaggerated fringe of spikelike spines (sub. 

 genus of Cinadua Wulp). 



Chaetogonophora, new subgenus 

 135(134). Scutellum without bristles. Aedeagus not long, 

 free and curved (subgenus of Cinadus Wulp). 



Haplonota Frey 

 Scutellum with stout, marginal bristles. Aedeagus 

 remarkably long, free, exposed and curved or 

 coiled. Female eighth sternite and tergite with 

 prominent, stout fringe of bristles. Ovipositor 

 as in Senoprosopis Macquart, short, cylindroid 

 conical and deflected down at apex on much 

 smaller ninth and tenth segments. 



Cinadus Wulp 



136(46). Posterior branch of third vein ends distinctly 

 behind wing apex. Ovipositor of female short, 

 especially segments 9 and 10; segment 8 cylin- 

 drical. Face moderately gibbous, with strong 

 bristles Eichebax Bigot 



Posterior branch of third vein ends virtually at 

 wing apex. Ovipositor of female elongate, cy- 

 lindrical, tapered. Tergite 10 with a prominent 

 circlet of spines on either side; face plane, with 

 an epistomal row of bristles and stiff, coarse 

 pile above .... Peoctacanthella Bromley 

 137(114). Eighth sternite recessed beneath seventh, hence 

 very short. Gibbosity of face large and promi- 

 nent. Rather large flies. Females with char- 

 acteristic type of ovipositor . Antipalus Loew 



Eighth sternite not recessed beneath seventh; no 

 lappetlike extension of eighth sternite as in 

 Machimus Loew. Gibbosity of face distinct 

 but comparatively short, and shorter than 

 Machimus. Small or medium size flies (sub- 

 genus of Machimus Loew). . Epitriptds Loew 



Genus Blepharotes Westwood 



FiGUKES 352, 693, 1398, 1407, 2296, 2321, 2451, 2505 



Blepharis Macquart, Diptferes exotiques, vol. 1, pt. 2, tab. 8, fig. 

 1, 1838. Type of genus : Asilus coriarius Wiedemann, 1830. 

 Figure only. Preoccupied, Pisces, 1817; Orthoptera, 1831. 



Craspedia Macquart, Dipt^res exotiques, vol. 1, pt. 2, p. 82, 1838. 

 Type of genus : Asilus coriarius Wiedemann, 1830. Pre- 

 occupied, Lepidoptera, 181G. 



Blepharotes Westwood in Duncan : The Naturalist's Librar.v, 

 vol. 28, p. 329, 1840. Type of genus : Laphria splendidissima 

 Wiedemann, 1830, as Blepharotes abdominalis Westwood, 

 1840, by monotypy. 



Psecas Jaennicke, Abh. Senckenberg, naturf. Ges., vol. 6, p. 359, 

 1867. Type of genus : Psecas fasciaius Jaennicke, 1867, by 

 monotypy. 



Giant flies, readily recognized by the broad, flat 

 abdomen, bearing dense, platelike tnf ts of pile laterally. 

 The third antennal segment is exceptionally long, the 

 style of t«n short and the venation is distinguished by the 

 long petiole of the marginal cell, the dilated, second sub- 

 marginal cell and the first posterior cell. Length 25 to 

 50 mm. 



Head, anterior aspect: The head is wide, nearly 

 twice as wide as the height of each eye, cheeks omitted, 

 but not as wide as the thorax. Face below the antenna 

 about a fourth the head width, strongly divergent be- 

 low. The face is pubescent, with or without pile and 

 almost no pile on the upper third, and with a more or 

 less circular fringe above the subepistomal area of 

 conspicuous, long, stout bristles placed in 1 or more 

 rows and usually a few others on the lower middle 

 third of the face. These bristles extend down the 

 sides of the large, oblique, subepistoma. Front large, 

 sunken in the middle with transverse impression, pol- 

 linose, with a subocular row of bristles and a sublat- 

 eral patch anteriorly or in the middle of each outer 

 half. Vertex deeply excavated, a little more nari-ow 

 than the front, its sides steeply sloping. Ocellarium 

 large but quite low, bearing 2 or 3 bristles between 

 the posterior ocelli and others behind. 



Head, lateral aspect: The head is of mediimi 

 length, the face comparatively short beneath the an- 

 tenna, nearly plane throughout its length and very 

 slightly concave or convex over portions of it. Occi- 

 put short, concave across the middle, a little better de- 

 veloped medially above and below and at the lower 

 eye comers. Cheeks unusually high and well de- 

 veloped. The pile of the occiput is dense and coarse 

 on the lower fifth ; bristles begin below the middle and 

 the dorsal elements are comparatively stout. The pro- 

 boscis is robust, extending beyond the face, generally 

 held obliquely downward, and with bluntly rounded 

 apex bearing 4 bristly hairs. Palpus large with nu- 

 merous, veiy stout bristles and with a distinct trace of 

 a fused basal segment. The antenna is attached at the 

 upper third of the head and is moderately elongate, 

 with the first segment twice as long as the second and 

 the third segment long, attenuate distally and varying 

 from 114 to nearly 3 times the combined length of the 

 first 2 segments. Third segment generally only a little 

 wider than the second segment, it may be twice as wide. 

 There is a distinct microsegment followed by a style 

 wliich in the type of genus is usually at least half as 

 long as the third segment, sometimes longer but some- 

 times it is very short and basally swollen. 



Thorax : The mesonotum is broad and low, pollinose, 

 with scanty, scattered, fine, bristly pile laterally above 

 the wing, behind the humerus and medial to the 

 humerus. There is a well differentiated acrostical row 

 and a double, dorsal, central row becoming longer 

 posteriorly and with 3 to 5 pairs of prominent bristles 

 before the scutellum. The lateral complement of 

 bristles is long and stout and consists of 2 notopleural, 



1 supraalar, 1 to 2 suprapostalar, 5 or 6 postalar, 

 and 4 to 6 scutellar pairs. Scutellum thick, sometimes 

 flattened on the disc, and with partly impressed rim and 

 a few scattered hairs on the surface. Pronotum with 



2 to 6 pairs of stout bristles, the lateral portion some- 

 times with bristles and the lateral propleuron and 

 cervical sclerites characteristically with dense tufts of 



