372 C. K. OSTEN SACKEN'S PRODROME 



r Body altogether gi-ay or blackish 24. plangens Wied- 



I Body more or less marked with yellow 18- 



J Face black, with the usual stripes of fulvous iiollen 14. fi'igidus n. sp. 



1 Face ferruginous in the middle 19. 



Apical spot lai-ge, reaching beyond the second submarginal cell, and invading the first posterior . 20. 



19. 



* ^ The apical sjjot does not reach beyond the second submarginal cell 22. 



(The hyaline space, between the crossband and the apical spot, is confined to a small triangle in the 

 second and third posterior cells 17. moechus ' n. sp. 

 The liyaline .space, etc., reaches across the first posterior cell 21. 



{Abdomen with a broad, yellow, longitudinal stripe in the middle, enclosed between two blackish 

 stripes 16. univittatus Macq. 

 Abdomen brown, with three brownish-yellow, often indistinct longitudinal strijjes 18. ULOrosus n. sp. 



r Abdomen yellow, with four black stripes 23. 



'l Abdomen black, yellow on the sides, and with yellow triangles on the segments . . 13. Indus n. sp. 



Frontal tubercle and scutelluni reddish 19. vittatus Wied. 



■^ Fi'ontal tubercle black ; scutelhmi at the base, more or less blackish 20. striatus n. sp. 



DESCRIPTION OF THE SPECIES. 



A. The apical portion of the wing, beyond the cros.sband, is hjahne, without any dis- 

 tinct brown spot or brown border. 



1. Chiysops atropos n. sp. 



"iChrysops divisns Walkei-, List, etc., I, p. 204. 



$ . Alto<>-ether black, wings tinged with black, e.'ccept the apex, which is hyaline. 



Length, 9-10 mm. 



Female. Altogether black ; a large, shining black, obtriangular sitrface occupies almost 

 the Avhole face, showing each side a mammiform protuberance ; streaks of fulvous pollen be- 

 tween this triangle and the black cheeks ; pollen of the same color forms a narrow border 

 alono- the facial orbit, round the root of the antennte and on the sides of the front ; the 

 black, .shining, frontal cahosity is separated from the vertex by an opaque, brownish-poUi- 

 nose crossband. Palpi black, brownish on the inside. Antenna3 black, comparatively long, 

 the first and second joints being longer than usual ; the first somewhat incrassate. Thorax 

 clothed with a very thin chocolate-brown pollen, hardly concealing the shining black color 

 beneath ; it is more dense anteriorly, where it forms two indistinct lines, abbreviated poste- 

 riorly, and more visible from a side view ; (this thoracic pollen is very easily rubbed off). 

 Pleurae brownish. Abdomen with scattered whitish hairs toward the tip. First joint of mid- 

 dle and hind tarsi yellowish, except the tip, which is black ; root of second joint likewise 

 pale. Apical tliird of the wings hyaline ; the remainder black, which color is most saturate 

 along the costa ; anal cell and the whole anal angle, grayish. The veins in the hyaline, ap- 

 ical portion of the wing are yellowish, especially the costal vein. 



Bab. Florida (Wekiva River, in March, Prof J. Wyman ; Indian River, E. Palmer). 

 Eighteen female specimens. 



1 This is the hvpotlictical female of C. moechus d, described below. 



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