in the Collection of W. W. Saunders, JEsq. 293 



Genus Syrpiius, Fabr. 



Syrphus colludens. 



Foem. — Niger, sat gracilis, capite lato nitente antice testaceo, 

 fronte nigro-vittata, antennis ferrugineis, thorace vittis duabus 

 lateralibus interruptis Havis, sciitello pallide luteo, abdomine 

 lineari fasciis quatuor excavatis (1* interrupta) pallide luteis, 

 guttis diiabus basalibus flavis, seginentis clialybeo-iiiargi- 

 natis, femoribus tibiisque antcrioribiis testaceis, alis sub- 

 cinereis angustis. 



Female. — Black, rather slender : bead broad, shining, testaceous 

 in front and beneath ; front with a black stripe ; antennas ferru- 

 ginous ; thorax with a yellow interrupted stripe on each side ; 

 scutelium pale luteous ; abdomen linear, with four pale luteous 

 bands ; first band interrupted ; second, third and fourth excavated 

 on the hind side ; hind borders of the segments chalybeous, a 

 yellow dot on each side at the base; anterior femora and tibise 

 testaceous, the former black at the base ; wings greyish, narrow ; 

 veins black. 



Length of the body 4 lines ; of the wings 8 lines. 



Mexico. 



Fam. CONOPID^. 

 Genus CoNOPS, Linn. 

 Conops bipunctata ? 

 Foem. — Ferruginea, argenteo-tomentosa, capite guttis duabus 

 nigris, abdomine sub-clavato basi supra nigricante, tibiis 

 tarsisque nigris, alis obscure cinereis, halteribus testaceis. 



Conops hipunclatus ? Loew, Bericht Verhandl. Kon. Preuss. 

 Akad. Wissensch. Berl. 18-32, C59, 18. Female. — Ferruginous, 

 with silvery tonientuin : head with a black dot on each side be- 

 tween the eyes ; third joint of the antennae lanceolate, with a short 

 apical seta; abdomen gradually deepening from the base to the 

 tip, blackish above towards the base ; tibise and tarsi black ; wings 

 dark grey; veins black ; halteres testaceous. 



Length of the body 6 lines ; of the wings 9 lines. 



Loew's description is from a Mozambique specimen, and differs 

 somewhat from the character of the insect here described. 



The above author, in the " Archiv fiir Naturgeschichte (185?)," 

 page 137, divides Africa into seven eutonnological districts; the 

 first with Egypt, Nubia and Abyssinia ; the second, or the whole 

 northern coast from Tripolis to Morocco; the third, or the Western 



