16 HENRY F. CARTER. 



to be referable to it rather than to the other American species — L. kerteszi var. 

 americanus, nov. 



5. — Length of body (one specimen), 2-2 mm. ;* length of wing, I'l mm. ; length 

 of antennae, 0-33 mm. ; width of head, 0-30 mm. 



Head shining dark brown or blackish, the antennal depressions cinnamon-coloured, 

 clothed with short dark hairs on the vertex and occiput ; clypeus dark brown, with 

 twelve hairs— five on each side and two central ; eyes separated by a Space equal to 

 about one-third the width of the head. Proboscis black. Palpi (fig. 2, b) blackish 

 brown ; third segment greatly swollen, with the orifice of the sensory pit large, more 

 or less ovate, occupying the distal two-thirds of the inner side ; fourth segment sub- 

 cylindrical, distinctly (one-fifth) shorter than the third. Antennae (fig. 5, h) short, 

 dark brown, with greyish hairs and moderately long, curved spines ; fourth to 

 thirteenth segments transversely oval, from 0-6 to 0-8 as long as broad ; fourteenth 

 segment slightly more than twice as long as wide, equal in length to the three preceding 

 segments together. Thorax shining black or blackish brown, sparsely clothed with 

 short dark hairs ; scutellum \\\i\\ three pairs of black bristles, the central pair large. 

 Wings whitish, the anterior veins terminating in a brown stigma at some distance 

 before the middle, arranged as in fig. 8, e ; fifth vein bifurcating below the ends of 

 the costal and third veins. Halteres white, the stems infuscated. Legs blackish 

 brown, the tarsi paler brown ; metatarsi and second tarsal segments without spines 

 except at the extremities. Claws simple, equal, each with a basal bristle. Abdomen 

 brown, distinctly paler than the head and thorax, with short dark hairs. Lamellae 

 brown, 0-18 the length of the wing. Spermathecae two, highly chitinised, sub- 

 spherical (diameter 36 /i) ; the commencement of the duct scarcely chitinised. 



^. — Length of body (one specimen), 1-9 mm. ; length of wing, LI mm. ; length 

 of antennae, 071 mm. ; width of head, 0-30 mm. 



General coloration apparently (so far as can be judged from a balsam preparation) 

 dark brown or blackish, the tarsi paler. Head : frons bare, occiput and vertex with 

 scanty hairs ; clypeus with two pairs of short hairs, eyes widely separated, the space 

 between them being two-fifths the width of the head. Palpi : third and fourth 

 segments sub-equal, the third slender, the sensory organ situated in the distal half. 

 Antennae (fig. 4, h), very similar to those of the male L. bezzii {q.v.), but with the basal 

 segments of the flagellum less compressed, the fourteenth segment relatively shorter 

 (about three and one-half times as long as wide, and slightly more than one-third the 

 length of the last segment), and the fifteenth segment more strongly swollen distally ; 

 fourth to thirteenth segments varying from 0-6 to twice the width, fifteenth segment 

 nearly eight times as long as the greatest width {i.e., near the distal extremity), 

 fourteenth and fifteenth segments, taken together, about equal in length to the 

 preceding seven segments united. Thorax : scutellum with two pairs of bristles. f 

 Legs slender, especially the middle and hind pairs ; metatarsi of the four anterior 

 legs with a few small spines (usually one pair at the base and apex and one, unpaired, 

 near the middle), hind metatarsi and second tarsal segments with a pair of spines or 

 spine-like bristles at the apex. Claws of the fore and middle legs equal, one with a 

 long basal tooth (fig. 4, b), the other with a bristle ; of the hind legs equal and simple. 

 Hypopygium : Unfortunately the single preparation available is not in a sufficiently 

 good condition to allow a satisfactory interpretation of the detailed structure of 

 the intermediate appendages, but the claspers (fig. 4, a) are of peculiar form and 

 will probably provide specific characters. 



* Townsend gives the length of the body (including the lamellae) as 1-6 mm. to 2-2 mm. 

 according as the abdomen is empty or distended with blood. 



t The characters afforded by the wings cannot be determined in microscopical preparations 

 with any degree of accuracy, unless the specimen is stained. In addition, the wings In the 

 specimen described were considerably twisted. 



