. Bulletin - American Museum of Natural History. Natural history; Science. 1906.] Cockerel!, Fossil Saw-Flies jroui Florissant, Colorado. S^^ Hab. âTertiary shales of Florissant, Colorado, at Station 14 (some f mile S. W. of Florissant, on hill facing north). Collected July, 1906, by Dr. W. M. Wheeler. Type in Amer. Mus. Nat. Hist. Hemichroa eophila sp. nov. Length about 10 inm.; of anterior wing about 9 mm.; breadth of thorax about 2\ mm.; of abdomen 2f mm. Head and thorax black; abdomen a warm sepia brown, blackish on first two segments, and with dusky entire bands on the three following; wi
. Bulletin - American Museum of Natural History. Natural history; Science. 1906.] Cockerel!, Fossil Saw-Flies jroui Florissant, Colorado. S^^ Hab. âTertiary shales of Florissant, Colorado, at Station 14 (some f mile S. W. of Florissant, on hill facing north). Collected July, 1906, by Dr. W. M. Wheeler. Type in Amer. Mus. Nat. Hist. Hemichroa eophila sp. nov. Length about 10 inm.; of anterior wing about 9 mm.; breadth of thorax about 2\ mm.; of abdomen 2f mm. Head and thorax black; abdomen a warm sepia brown, blackish on first two segments, and with dusky entire bands on the three following; wings hyaline, nervures brown. This is a perfectly typical Hefnichroa, ex- cellently preserved. It differs as follows from Macgillivray's figure of H. americana (Pr. U. S. Nat. Mus., XXIX, pi. xxxiii, fig. 62): (i) Transverse costal nervure a little more basad of basal nervure. (2) Third submarginal cell somewhat longer in proportion to its height. U) Transversomedial inserted well before mid- ^. ~ ^ Fig. 3. Hemichroa cO- dle of first discoidal cell. phUa sp. nov. The transverse marginal nervure arises from stigma about 180 yu from its end and is curved, passing obliquely down to reach the lower border of marginal cell about 180 /^< beyond insertion of second transversocubital. The lanceolate cell is well pre- served, and formed as in typical Hemichroa. The venation of the hind wings is also typical and serves to distinguish the insect from Dineura. Except for the lanceolate cell, there is a good deal of re- semblance to Pseudodineura; the wings show the following differences from Pseudodineura hepaticce, as figured by Macgillivray (Pr. U. S. Nat. Mus., XXIX, pi. xxxiv, fig. 65): (i) Stigma and marginal cell conspicuously longer; (2) transverse costal nervure more basad of basal nervure; (3) first discoidal cell narrower above; (4) third submarginal cell longer. The following measurements are in /<: Length of first submarginal cell . . , . ' 405. second " " on ma
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