206 O. R. Osten Sacken: Diptera 



crossvein; the posterior basal crossvein (closing the anal cell) is very 

 little oblique; the anterior basal crossvein (separating the discal cell 

 from the second basal) is a little beyond the anal cell; the axillary 

 angle of the wing is exceedingly small, not larger than the anal cell. 

 [semilauta: wings of medium length and breadth; the second vein 

 runs parallel to the costa; its tip is twice nearer 'to the apex than the 

 posterior crossvein; third and fourth veins somewhat undulating; first 

 posterior cell only slightly attenuated at tip; anal cell cut ofF square, 

 therefore the posterior basal crossvein not oblique; the anterior basal 

 crossvein a little before the posterior one; anal angle of the wing 

 exceedingly small, smaller than the anal cell.] 



Chaetotaxy. The postvertical pair nearly in a line with the 

 inner vertical; the outer vertical bristle is placed some distance from the 

 inner one, above the eye; the fronto-orbital bristle, soon below the 

 ocelli, is but little smaller than the vertical ones; lower down a second 

 minute fronto-orbital bristle. [semilauta: the postvertical pair has its 

 normal position behind the inner vertical bristles; the second fronto- 

 orbital is as large as the first.] On the thorax one posthumeral bristle,- 

 the posterior one, in its normal position, in the acute angle formed by 

 the thoracic suture with the dorsopleural ; of the anterior posthumeral 

 bristle I do not even perceive the scar; a distinct, long sterno- 

 pleural bristle, a short distance above the middle coxae; two supra- 

 alar, and a pair of praescutellar bristles, wide apart; scutellum with 

 two long, approximate bristles at the tip. [semilauta: two posthumeral 

 bristles; the sternopleural is replaced by a row of three or four very 

 fine hairs; the rest as in hexapla]. The fringe of a few stiff bristles 

 which exists in Taeniaptera at the front end of the forecoxae seems to 

 be replaced here by a single hair; this must be verified however on better 

 preserved specimens than mine are. 



Euryhata difiers from Calobata (subgenus Taeniaptera) in its 

 much more slender shape, especially of the thorax; the much shorter 

 and narrower ovipositor; the filiform appendages of the ventral fork- 

 like organ in the male; the very small anal angle of the wing; the 

 long second vein and the presence of minute spines on the underside 

 of the middle and bind femora, towards the tip. 



JEuryhataheooa'plan.. sp. $ $. Metallic blue, legs reddisli- 

 yellow, wings with six brown crossbands and a brown a'pex. 

 Length: 11 — 12 mm. 



Clypeus reddish, with blue metallic reflexions; palpi yellowish-red; 

 antennae brown; front and Vertex metallic-blue with violet reflexions; 

 the former with a velvet-black, opaque stripe in the middle. Thorax 



