Chrysops bistellatus
date: label: Collection Date
content: 27 Jun 1904
name: label: Collector
content: Daecke
notes: label: Notes
content: Chrysops blstellatus n sp. #F Length 8-9_1/2 mm., body slender.-Face, facial callosities and pal pi yellow. Cheeks brownish. Front covered with yellow pollen which also surrounds the annulate and facial orbits. Frontal callus black. The brownish ocellar tubercle is connected with the frontal callus by a narrow, shiny black line. First segment of antennre yellow, second and base of third brownish, the annulate portion black. The two inner dorsal stripes of thorax are greenish gray, the lateral yellowish and they alternate in the usual manner with three brown stripes, of which the mid-dorsal one is re latively narrow. The pleura are light yellow with the usual dark brown stripes. Scutellum yellowish brown. Abdomen yellow, with one broad , light brown stripe on each side. These stripes begin narrowly at base of second segment attaining their full width apically and thus form a rectangular triangle; the right angle being apically dorsad. At the fifth, sometimes the sixth, segment these stripes coalesce and occupy the full area of the abdominal apex. The brown stripes are of uncertain contour and often intensified in color toward the center of each segment, thus forming a line of indefinitely shaped spots. On some specimens these spots occupy the full width of the lateral stripes, in which case they form a dark brown stripe right and left. The last two or three segments are always more infuscated than the others. Venter yellow, darkened at apex and a light brown line on either side abbreviated anteriorly. Legs reddish yellow, base of hind femora brown, the distal two thirds of front and hind tibiae brownish or blacK; the distal half of middle tibiae brownish. Tarsi black, middle and hind tarsi reddish at base. Wings: the apical spot occupies the entire apex and coalesces with the crosshand except on the first submarginal cell where a quadrate hyaline spot infringes in a diagonal position equally on the crossband as well as the a pical spot. The upper corner of this hyaline spot touches where the second long itudinal vein slightly curves. The lower corner infringes slightly upon the first posterior cell and in rare cases continues in a semi-hyaline fashion as a narrow shade into the second posterior cell. The distal corner of the hyahne spot slightly exceeds the point where the third vein branches. The brown costal border embraces the first basal cell except a small distal spot. The second basal cell is slightly infuscated at the upper proximal portion. The third and fourth posterior cells are brown, the fifth is clouded at its distal half, a shade which fades away into the outer border of the an31 and axillary cells. The posterior branch of the fifth longitudinal vein is surrounded by a brown shade widening toward the posterior margin . The discal cell lightens towards middle and base into a semi-hyaline shade which often affects the base of the fourth posterior cell. Anal cell widely opell. In this species the hyaline triangle has practically disappeared, a character by which it can readily be distinguished from all other North American species. The description was made from sixteen females taken at Brown's Mills Junction, N. J .
label: Notes
content: [Label 1] CHRYSOPS BISTELLATUS Daecke; [Label 2] COTYPE; [Label 3] CoType No. 26608 U.S.N.M.; [Label 4] Daecke Collection; [Label 5] Brown'sMillJc VI.27.1904 NJ
label: Record Last Modified
content: 2 Mar 2016
label: Specimen Count
content: 1
place: label: Place
content: Browns Mills Junction, Burlington, New Jersey, United States
setName: label: See more items in
content: Entomology Types
publisher: label: Published Name
content: Chrysops bistellatus Daecke, 1905
dataSource: label: Data Source
content: NMNH - Entomology Dept.
identifier: label: Barcode
content: USNMENT00258383
label: Other Numbers
content: Inquire SerNum : 45213
label: Other Numbers
content: USNM Type Number : 26608
label: USNM Number
content: USNMENT00258383
objectType: label: Type Citation
content: Daecke, E. 1905. Entomological News. 16 : 249, one figure.
label: Type Status
content: Syntype
taxonomicName: label: Taxonomy
content: Animalia, Arthropoda, Insecta, Diptera, Brachycera, Tabanidae, Chrysopsinae
physicalDescription: label: Prep Count
content: 1
label: Preparation
content: Pinned
label: Remarks
content: Syntype
label: Sex
content: Female
label: Stage
content: Adult