304 MAINE AGRICULTURAL EXPERIMENT STATION. I9II. 



4. Trichonta vulgaris Loew. 

 Berlin. Ent. Zeitschr. XIII. 149. 1869. 



Male and female. Length 3.2-3.5 mm. Head and antennae 

 fuscous, basal joints of the latter and palpi yellow. Dorsum 

 of the thorax yellow with 3 fuscous stripes which are some- 

 times confluent; scutellum, metanotum and the pleura except 

 between the fore coxae and the humeri, fuscous. Abdomen 

 fuscous, each segment except the first with a posterior fascia. 

 Hypopygium black. Coxae and legs yellow, tarsi darker; in the 

 female the last 4 joints slightly tumid below. Wings cinereous, 

 toward the costa yellowish ; cubitus forks under the proximal 

 end of the crossvein. "Md., D. C." 



5. Trichonta obesa Winnertz. 

 Verb. Zool.-bot. Ges. Wien. XIII. 854. 1863. 



Female. Length 4.5 mm. Fuscous ; basal joints of the 

 antennae, palpi, humeri, legs and halteres yellow. Tarsi dark; 

 femora with brown dash on the underside near the base ; hind 

 tarsi slightly shorter than the tibia. Abdomen yellow, with 

 a triangular spot, covering the larger part of each segment. 

 Wings grayish hyaline, the media forks under the base of the 

 radial sector, the cubitus under the center of the crossvein. The 

 male hypopygium is described and figured by Mik in Verb. 

 Zopl.-bot. Ges. Wien. XXX. 607. 1880. "Europe and Green- 

 land." 



6. Trichonta hellula n. sp. 

 Male. Length 3.5 mm. Head black, face, palpi and 4 basal 

 joints of antennae yellow, remainder of flagellum brown; an- 

 tennae about a third longer than the head and thorax. Dorsum 

 of the thorax yellow with 3 brown stripes ; pleura, scutellum 

 and metanotum largely dark brown ; hairs yellow, setae brown. 

 Abdomen dark brown, posterior margin of each segment pro- 

 duced anteriorly on the sides and anterior. part of the venter, 

 yellow; hypopygium dark (Fig. 112). Coxae and legs yellow, 

 tarsi darkened, each femur with a brovv^n spot on the under- 

 side near the base ; hind metatarsus slightly less than half as 

 long as its tibia. Wings hyaline, grayish tinged, anterior veins 

 brown; subcosta ends in Ri beyond the middle of the basal cell; 

 the media forks slightly distad of base of Rs ; the cubitus forks 



