128 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



tudinal fold between radius and media (figs. 95 to 

 100) ; eyes usually not emarginate. ,_ yj 



/;f,^^2^^£>y^'^'^/ 'J ? 2' - 'J II. NeoempheriaJ'^^ 



ff. Wing hyaline, without dark fasciae or spots; costa 

 usually meets R4+5 at tip of wing (figs. 101-106) ; 

 eyes usually emarginate at base of antennae; Scio- 

 phila Winn). ^ 12. MycomyaJ"^ 



I. Genus Monoclona Mik. ^^ C^^M^^ \ ^^ ■ 

 Monoclona, Mik, Wien. Ent. Zeit. V. 279 (15) (1886). 

 Stcrgeria, Van der Wulp, Tijdschr. v. Ent. XIX. versl. 49 (1876) 

 Resembles Sciophila (Lasiosoma) but differs mainly in hav- 

 ing a simple cubitus. Head small, flattened above ; eyes oval, 

 slightly emarginate at base of the antennae; ocelli three, placed 

 high upon the front, widely separated, the middle one but little 

 smaller than the laterals; antennae projecting forward, arcu- 

 ated, 2+14 jointed, the basal joints differentiated, cupuliform, 

 the flagellar joints rounded, short haired ; palpi incurved, four 

 jointed, apical joint longest, cylindrical. Thorax highly arched, 

 with bristle-like hairs. Abdomen slightly constricted at the 

 base, with seven visible segments, in the male cylindrical, in the 

 female slightly depressed. Legs moderately long, the tibiae 

 with fine lateral setae and long spurs ; the fore tarsi twice as 

 long as the tibiae. Halteres large and with elongate knobs. 

 Wings hairy (fig. 84), broad, longer than the abdomen; costa 

 produced beyond the tip of R4+5 ; subcosta ends in the costa far 

 distad of the small cell R^, this cell short, R-M crossvein a little 

 longer than its distance from the fork of the media; Sca (sub- 

 costal crossvein) a little proximad of the small cell ; cubitus sim- 

 ple. The genitalia of the male rather slender and elongate, the 

 lateral lobes prolonged, and curved forceps-like (fig. 107). 



Monoclona elegantula n. sp. 

 Male and female. Length 3 mm. Head black, palpi, face, 

 scape of antenna, and the two basal joints of flageUum yellow, 

 the remaining flagellar joints fuscous. Thorax yellow, the 

 mesonotum variable, in one specimen with three confluent black- 

 ish stripes, in the others with the lateral stripes dark, the middle 

 one only faintly indicated. In the darkest specimens the scu- 

 tellum and metanotum are infuscated, in the others these parts 

 are yellow ; hairs pale. Each intermediate abdominal segment 



