1 910.] E. Brunetti : Blood-sucking Muscidce. 67 



cylindrical, narrow, small, much shorter than proboscis, often 

 inconspicuous through lying flat against the epistome. 



Thorax a little longer than broad, of the average Muscid type, 

 with macrochsetse,' and minute bristly hairs. 



Abdomen ovato-conical, moderately arched, generally marked 

 with infuscated spots, a dorsal stripe, or transverse darker bands. 

 Legs of moderate size and length, minutely pubescent, with a 

 few stronger bristles ; inner side of middle tibiae bare. Wings of 

 the typical Muscid venation, resembling that of Cyrtoncura stahii- 

 laiis, F. (also a " common house fl}- "), except that the 4th longi- 

 tudinal vein is bent upwards in a sharper curve after passing the 

 inner transverse vein, thus leaving the ist posterior cell rather 

 broadly open ; 3rd longitudinal vein with some distinct but minute 

 bristles at its base. 



The metamorphoses occur in decaying vegetable matter, horse- 

 dung and similar substances. Both sexes in the adult suck blood, 

 including, occasionally, that of man, but they are especially irri- 

 tating to horses and cattle. The genus is probably world-wide, or 

 at least wherever civilised man is found. 



Tabic of Oriental species of STOMOXYS. 



A Fore tarsus normal. 



B Abdominal segments without 



bands, but with two distinct 



(often ill-defined) spots on 



at least the 2nd and 3rd 



segments. Tibiae pale at 



base onh'. 

 C Frons in cf :f width of head ; 



in $i. 

 D Thorax with 4 well-defined 



(but variable) stripes, never 



divided. Width of frons 



I" in cf ;^, in 9 . . . . calcitrans, L., cr' 9 . 



DD Thorax with 4 oblong large 



spots, each more or less 



divided. Width of frons 



(presumably) neither ^ nor 



^ as sca is given as 



doubtful . . . . pluriiio/afa. Big. 



CC Frons in cf I, { 9 unknown). 



Tibiae with basal half pale, 



middle pair apparently 



wholly so .. .. oblongoptmctata, sp. nov., (f . 



' The chtctotaxj' of S. calcilraus is fully described under the heading of 

 that species rather than under that of Stomoxys, as I do not wish to suggest 

 that that particular arrangement of bristles is necessarily generic, not being 

 acquainted with the cluetotaxy of species from other parts of the world, that 

 is to say of species which must obviously reurain in this genus. The ch(Ptotavy of 

 at any rate .nil the species I have seen is uniform. 



