242 Maine; agricuIvTuraIv i^xperiment station. 1909. 



cation only indistinctly pilose ; ocelli large, arranged in a trans- 

 verse line on the broad front, middle one only slightly smaller 

 than the others; eyes pilose; palpi incurved, rather long, basal 

 joint very small, second broad, about as long as broad, third joint 

 about half as broad but twice as long as the second, fourth 

 slender, about. 5 times as long as broad; proboscis short. 

 Thorax moderately arched, dorsum and scutellum provided 

 only with hairs, those over the base of the wing and on the 

 scutellum rather longer, pleura and metathorax nearly bare. 

 Abdomen depressed, flattened, broadened apically, segments 

 finely setulose, particularly on basal portion; male genitalia 

 (fig. 97) small, simple, consisting primarily of two incurved 

 lateral lobes, toothed at the apex. Legs moderately long; 

 coxse long, these and the femora short haired, setulae of the 

 tibise less than ^ the diameter of tibia in length, spurs strong; 

 fore metatarsus shorter than the tibia; all tarsi finely setulose, 

 claws with teeth near the base of each ; empodium conspicuous. 

 Wings (fig. 88) resembling those of Platyura; media arises 

 near the base of the wing; its first section is delicate and fold- 

 like; R2+3 joins Ri near its apex; anal vein prominent, pro- 

 duced to the wing margin. 



Table of species. 

 a. Subcosta short, ending at or before the base of the radial 

 sector, 

 b. Length 6 mm. Abdomen yellow with anterior portion 

 of each segment black. i. gracilis. 



bb. Length 8 to 12 mm. Abdomen reddish yellow, first 

 segment black; female. 2. . pectoralis. 



aa. Subcosta ends distad of base of radial sector. 



b. Mesonotum and abdomen reddish yellow, pleura, 

 metanotum and first abdominal segment black; 

 male. 2. pectoralis. 



bb. Mesonotum black or with brown stripes. 

 c. Abdomen in part reddish yellow. 



d. Mesonotum reddish yellow with 3 dark brown 

 stripes; part of third, fourth and fifth 

 abdominal segments yellow, other seg- 

 ments black. 3. maudcB. 

 dd. Mesonotum black, abdomen yellow, except 

 first 2 segments. 4. pvilchra. 

 cc. Abdomen wholly black. 5. nigriventris n sp. 



