182 Journal New York Entomological Society. [Voi. xv. 



J*.— Similar, differing in sexual characters; segments i-6 having bands on 

 apical margins. Length 5-5-5 mm. 



Locality. — CotuUa, Texas, May 9, 1906, on Verbesina eiicelioides 

 (F. C. Pratt and J. C. Crawford colls.). 



Type. — No. 10049, N. S. National Museum. 



The specimens were almost always found congregated on particular 

 flower heads, from six to ten often being taken on a single head. Nor 

 were any found on other flowers of the same species growing just across 

 the road, although they were very abundant in the field where the 

 specimens were collected. 



This species differs from verbesince by the darker colored abdomen, 

 the stronger punctures on the abdomen, the dark tegulae and legs. 



Conanthalictus cotuUensis, new species. 



9 $ . — Green, with a strong silky luster, head and thorax tesselate ; mandibles 

 yellowish, the tips red ; clypeus apically black, fringed with long hairs ; antennae 

 brown, lighter below, in the 9 reaching to prothorax, in the $ to the tegulae ; teg- 

 ulae yellowish hyaline; wings smoky hyaline, nervures light, stigma brown; meta- 

 thorax with very close, fine punctures, the surface like a small honeycomb ; legs 

 dark, femora with a greenish luster, tibiae apically and tarsi reddish ; abdomen green- 

 very strongly silky from very minute transverse lines ; broad apical margins of seg- 

 ments brownish ; apical fimbria sooty brown. Length about 3.5 mm. 



Locality. — Cotulla, Texas, May 10, 1906, on Marilaiaiidium 

 organifolium (F. C. Pratt and J. C. Crawford colls.). 

 Type. — No. 10048, U. S. National Museum. 

 This species was compared with conanthi by Professor Cdckerell 

 and said to differ by its smaller size, dark tibiae, darker stigma and 

 nervures and greener color. 



In this species the relative lengths of the joints of the maxillary 

 palpi are 6, 9, 12, 12, 8, 8 ; of the labial palpi 8, 4, 4, 6 ; the tongue 

 is more elongate than in LLaiictus. There is not a trace of an anal rima 

 in the female in this or the other species of the genus. 



Sphecodosoma, new genus. 



Type. — S. pratti Crawford. 



In appearance like the genus Sphecodes but the basal nervure is only 

 gently curved, the mouth parts elongate, the tongue linear, about ten 

 times as long as broad, the scopa strong ; insertion of antennae less 

 than one third the distance from clypeus to ocelli ; the labial palpal 

 joints have the following relative lengths: 25, 17, 12, 12 ; the maxil- 

 lary palpi 21, 60, 60, 20, 16, 16 ; mandibles dentate. 



