SIOBLA. 3 



maxillary is small, the second is much shorter than the third and slightly shorter than 

 the fifth, which is dilated at the apex, and is a little longer than the sixth, which is a 

 little shorter than the second, the third is the longest ; the basal joint of the labial 

 palpus is the longest, the third and last are thicker than the others, the third is a little 

 longer than the fourth and shorter than the second. The outer lobes of the labium 

 are broad and truncated at the top ; the inner lobe of the maxilla is straight on the 

 outer side, more rounded on the inner, and curves gradually and roundly on the top ; 

 the outer lobe is long and narrow, and terminates in a sharp point. 



Norton describes eight species under Strongylogaster, which are presumably to be 

 referred to Siobla. He describes the males as having the hind wings provided with 

 only one or no discal cellule ; but I presume this is so through the nervures being 

 situated along the edge of the wings. Some species, however, have undoubtedly two 

 discal cellules as in the females. 



Another North-American species is referred by Norton to Macrophya, just as a 

 European species has been so referred, because the coxae are rather large ; but it seems 

 impossible to use the size of the hinder coxae as a generic character when dealing with 

 Neotropical forms, however useful it may be when dealing with Palsearctic or Nearctic 

 species ; for it is impossible to draw the line between a moderately sized and an extra 

 large one, so many intermediate forms occur. 



Siobla is found in Japan, Burmah, West Yunan, Amoor, and Europe ; and Kirby 

 describes a species from Georgia. 



1. Siobla Ornaticornis. (Tab. I. f. 16, S ; 16 a, antenna; 16 5, head, from the 

 front.) 

 Nigra, antennarum artieulis 6°-9 m et basi, scutello, tegulis, pronoto, pleuris abdomineque subtus albis ; abdomine 



superne nigro, segmentorum margmibus albis ; pedibus rufescentibus, basi pallida ; alia byalinis, stigmate 



fusco, basi pallida. 

 Long, fere 11 millim. 



Hob. Guatemala, San Geronimo (Champion). 



The antennae are filiform, shortly pilose, longer than the abdomen ; third joint a little 

 longer than the fourth, the third apical shorter than the preceding. Clypeus incised. 

 Sutures on vertex very deep and distinct ; frontal area a mere depression surrounding 

 the lower ocellus. Antennal foveae deep, but ill defined. Head broad, scarcely pro- 

 jecting behind the eyes, which are oval ; the face is short. On the mesopleura there 

 is a black perpendicular line beneath the tegulae, and an oblique one commencing at 

 the fore wing ; the breast is black, as is also the greater part of the prothorax ; the 

 coxae and trochanters are white, as are also the hinder tarsi ; the four anterior tarsi are 

 black at the apex. Claws simple. There is a thin transverse white line on either side 

 of the postscutellum ; the white lines at the junction of the abdominal segments 

 above are wider at the sides. The wings are pilose ; the costa is only black between 

 the transverse basal nervure and the stigma ; the transverse radial nervure is received 



bb2 



