13G 



UNITED STATES NATIONAL MUSEUM BULLETIN 22 4 



dorsoventrally depressed proboscis, which besides being 

 somewhat attenuate distally is scarcely extended be- 

 yond the face, and at most barely juts beyond the face. 

 Also the ocellar callosity is much lower and less con- 

 spicuous although it does bear conspicuous bristles. 

 The second segment of the antenna is minute, at most 

 half as long as high. The third antennal segment is 

 quite long and arched. Face slightly convex but with- 

 out dorsal ledge. It bears numerous, remarkably stout, 

 yet finely attenuate bristles. Scutellar disc without pile 

 and middle of mesonotum with a wide, bare space. 

 Length with antenna 15 nun. 



Head, lateral aspect : The head is rather long because 

 of the prominent face and occiput. The face is quite 

 gently convex over most of the surface, a little more so 

 above as it retreats shortly beneath the antenna; im- 

 mediately beneath the antenna is a small extension 

 separated by a shallow groove. The cheeks are moder- 

 ately developed, the subepistomal area unusually long 

 and oblique, the height of the face therefore reduced. 

 Occiput prominent, especially below, because of the 

 gradual recession of the eye. It bears slender bristles 

 and bristly pile ventrally with the bristly elements com- 

 paratively numerous, forming 2 or 3 irregular rows 

 submarginally along the middle of the occiput. Dor- 

 sally, however, the bristles are greatly reduced in con- 

 trast to Tolmerolestes and there are only 4 behind each 

 upper eye corner. Upper occiput with some scattered 

 bristly pile. Proboscis from the lateral aspect slender, 

 becoming attenuate, narrow and pointed apically and 

 only the base a little swollen. From the dorsal aspect 

 it is rather wide, flattened and truncate at the apex and 

 comparatively wider than Dizonias. The palpus is 

 large, the first segment excavated, the second robust, 

 short, narrowed at apex, with an apical pore and with 

 a number of apical, lateral, and ventral stout bristles. 

 The antenna is attached at the upper sixth of the head 

 and is remarkably long, nearly twice the head length. 

 The first segment is about six times as long as the very 

 short second segment ; this segment bears some moder- 

 ately long bristles ventrally ; the second segment bears 

 only 2 setae ventrally. Third segment is about 3 times 

 as long as the combined length of the first two or a 

 little longer. This segment is a little narrowed towards 

 the base and apex, arched on its lower surface, slightly 

 concave above, and at the apex bears a small, transverse 

 pit with concealed spine. 



Head, anterior aspect : The head is nearly iy 2 times 

 as wide as high, the cheeks moderately developed. The 

 face below the antenna is a little more than one-fourth 

 the head width and slightly divergent below. The sur- 

 face is thinly pubescent, pile is absent; except along 

 the eye margin, the face is covered by numerous, quite 

 stout, curved bristles of moderate length, extended 

 down the upper half of the epistomal margin, and 

 extending above to the subantennal crease. The front 

 is rather short, wide, sunken, pollinose with a row of 

 long, stout bristles along the eye margin and anteriorly 

 a small patch of 3 or 4 setae on either side before the 

 antenna. The front is a little widened, the vertex 



scarcely excavated, the ocellarium low, set posteriorly 

 and opposite the posterior eye corners and bearing be- 

 tween the ocelli 2 pairs of bristles, one of them stout 

 and behind the ocelli 1 pair. 



Thorax. The mesonotum is thinly pollinose and 

 feebly shining, rather low, and with greatly reduced 

 pile consisting of a few scattered subappressed setae. 

 There is a wide bare space in the middle ; the acrostical 

 bristles or setae are absent; but dorsocentral elements 

 are distinct, moderately long, forming a double row 

 and only differentiated behind the humerus. There is a 

 large, submedial, bare space posteriorly. The humerus 

 bears 4 or 5 stout bristles and a few setae. There are 

 3 or 4 weak posthumeral bristles. The lateral bristles 

 are only moderately long but stout; the complement 

 contains 2 notopleural, 2 to 3 supraalar, 2 suprapost- 

 alar, 2 postalar, and 1 or 2 pairs of scutellar bristles. 

 The scutellum is flat basally, with 3 or 4 fine hairs later- 

 ally. Pronotal collar with 6 or 7 pairs of stout bristles, 

 5 or 6 similar bristles on the lateral pronotum, and 

 other more slender elements. The posterior margin of 

 the mesopleuron and the upper sternopleuron have 

 some bristly pile. The pteropleuron has a stout con- 

 spicuous bristle. The metapleuron has a vertical band 

 containing 5 or 6 bristles and bristly pile. Metaster- 

 num pilose, the postmetacoxal area membranous, and 

 the presternum fully dissociated. 



Legs: The pile of the legs consists of coarse, ap- 

 pressed setae without ventral fringes of long pile. The 

 hind femur and tibia are moderately elongate and 

 slender; the first 4 femora quite stout and a little swol- 

 len. Bristles moderately abundant but rather short. 

 Those of the first four legs more slender than those 

 of the hind pair, except that the medial bristles of the 

 hind femur are likewise slender. The hind femur bears 

 5 lateral bristles, 10 ventrolateral, 12 ventromedial, and 

 a medial fringe of some 20 bristles. At the subapex 

 dorsally there is a lateral bristle only and a weak bristle 

 on either side of the apex. These tibiae bear 4 dorso- 

 lateral, 5 dorsomedial, 3 ventromedial, and 3 stronger 

 ventrolateral bristles, and the apex has 8 or 9 bristles. 

 Middle femur with 5 anterior, 8 anteroventral, and a 

 regularly spaced posteroventral row of 14 bristles; 

 there is also 1 bristle posteriorly at the subapex and 

 longer bristly hairs at the apex. Middle tibia has 4 

 dorsal bristles, 3 or 4 anterodorsal, 5 anteroventral, and 

 5 posteroventral bristles. Anterior femur with 2 pos- 

 terior bristles on the outer half, 3 or 4 short bristles on 

 the anterior surface, and a transverse row of 5 or 6 

 bristles at the apex anteriorly. These tibiae have weak, 

 appressed bristles which include 4 anterodorsal, 6 pos- 

 terodorsal, and 4 posteroventral bristles. Apex with- 

 out spine. Claws stout, strongly curved on the outer 

 half, sharp ; the pulvilli and empodium well developed. 



Wings: The wings are broad, the marginal cell is 

 open by a distance equal its maximal width ; the tliird 

 vein forks opposite the posterior crossvein; oidy the 

 fourth posterior cell is closed and it is closed in the 

 margin. The anal cell is open, the alula is three times 

 as long as wide and the ambient vein is complete. The 



