so. 2146. 



SOME AMERICAN FOSSIL INSECTS— COCKERELL. 93 



Apex 



PROTOLOMATIA RECURRENS, new species (Bombyliida). 



Length, about 10 mm.; wing, 6.2 mm.; head, thorax, dorsal sur- 

 face, and apical part of abdomen black or dark brown, the abdomen 

 colorless at the sutures ; wings hyaline ; legs pale reddish. Thorax 

 dorsally bare; antennae moderately long, proboscis much shorter 

 than (vertical) length of head. Anterior cross- vein slightly ob- 

 lique, not at all approximately in a straight line with lower branch 

 of fourth vein, as it is in Lomatia 

 lateralis. Second vein strongly re- 

 curved at end, in the manner of 

 Alepidophora pealei^ but second 

 and third posterior cells essentially 

 parallel-sided, wholly unlike those 

 of Alepidophora; anterior cross- 

 vein considerably beyond middle of 

 discal cell; four posterior cells, all PiG.s.-rROTOLOMATiAREcuRREN-s 



' 1 • n OF WING. 



open, but nrst contracted apically; 



anal cell open; second submarginal cell squarely truncate at base, 

 with an appendicular nervure directed basad from the corner. 

 The following measurements are in microns : 



First submarginal cell on wing-margin 784 



First posterior cell on wing-margin 160 



Second posterior on wing-margin 800 



Third posterior on wing-margin 800 



Fourth posterior on wing-margin 1, 280 



Anal cell on wing-margin 160 



Praefurca 496 



First basal cell on first submarginal 1,440 



First posterior on first submarginal 976 



First posterior on second submarginal 1,456 



Discal on second basal 128 



Discal on first basal 1,200 



Discal on first posterior 752 



Discal on fourtli posterior 912 



Second basal on fourth posterior 160 



The discal cell is long, and its outer margin shows a very strong 

 double curve. 



Miocene shales of Florissant (Geo. W. Wilson). 



H olotype. —Csii. l^o. 61990, U.S.N.M. 



Differs from the type of the genus by having the second vein recur- 

 rent, as in Alepidophora., and also in many lesser details. It runs 

 in my key to Alepidophora.^ 



^EuU. Amer. Mus. Nat. Hist., vol. 23, pp. 229-235. 



