146 ENTOMOLOGICAL NEWS [Apr., '17 



6. Costal stripe strongly bisinuate posteriorly bella Loew 



Costal stripe not as in the alternative 7 



7. Pleura with oblique, fuscous stripe subeluta Johnson 



Pleura not as in the alternative 8 



8. Median vitta of wing attains the apex 9 



Median vitta not as in the alternative 12 



9. Outer part of cell 1st M2 and basal part of cell Ro not hyaline. 



Abdomen with lateral fuscous stripes 10 



Cell 1st M2 entirely hyaline. Abdomen without lateral stripes 



11 



10. Larger, coloration of wing dark fuscous-brown, basal half of 



cell M infuscate caloptera Loew 



Smaller, color of wing grayish-fuscous, basal part of cell M 

 grayish strepens Loew 



11. Cell Ml and cell M2 partially hyaline conspicua spec. n. 



These cells entirely fuscous eluta Loev/ 



12. Stigma yellow xanthostigma spec. n. 



Stigma dark fuscous 13 



13. The hyaline antestigmal spot extends as an irregular fascia to 



near the posterior wing-margin fratema Loew 



The hyaline spot not as in the alternative 14 



14. -Thoracic stripes distinct tricolor Fabricius 



Thoracic stripes obsolete vitrea Van der Wulp 



Tipxila alexandriana spec. n. (PI. XL fig. 1. lA and IB). 



Joints of antennal flagellum with the exception of the first, uni- 

 colorous, dark brown. Median vitta of praescutal mesonotum, divided 

 by a pale stripe. Wings without fuscous costal stripe. The hyaline 

 vitta does not extend beyond the extreme base of cell iM^. 

 $ . — Length 13-14 mm.; wing 16 mm. 



Head grayish-white, middle of front fuscous, occiput sufifused with 

 fuscous. Joints 1-3 of palpi j'cllowish-fuscous, 4 dark fuscous. Frontal 

 prolongation rather short, yellow, with a whit-sh bloom, and, like the 

 nasus, beset with short blackish hairs. Antennae robust : extended back- 

 ward they reach to the base of the abdomen; scapal joints and basal 

 half of first flagellar joint, yellowish, the rest of the flagellum black, 

 segments with well-marked basal and sub-apical enlargement, basal 

 setae of moderate length. 



Thorax. Pronotal scutum yellowish-fuscous. Mesonotal praescu- 

 tum a sordid, pale yellow, stripes black, conspicuous, the median stripe 

 narrowed posteriorly and divided by a moderately wide stripe of the 

 ground color; lateral stripes abbreviated, parasutural foveae and an- 

 tero-lateral margin of mesonotum black. Pronotal scutellum and 

 pleuro-dorsal membrane yellowish. Pleura black, overlaid with a hea\'y 

 whitish bloom, which almost completely conceals the ground color. 



