OF NATURAL UlSTORY. 771 



pale cinereous ; posterior margins of the S(';:mont.s with whit*- 

 hair, beneath [392] which the surface i8 dull piecous at tip ; 

 basal segment with a longitudinal improsst'd line at base : venter, 

 segmentis on the posterior margin with dull whitish hair. 



JjCngth about half an inch. 



% AVith more dense and obvious hair on the front 



Length less than half an inch. 



In warm days of March and April, this species may be ob- 

 served flying about near the surface of the earth. 



SPHECODES Latr. 



S. CONFERTUS. — Black, abdomen rufous, black at tip; puD< 

 tures dense. 



Inhabits Indiana. 



Body black, with close-set punctures : head rather small with 

 whitish hairs; mandibles piceous black : thorax, middle thoracic 

 longitudinal line very distinct, punctures equally close-set : scu- 

 te! with the impressed line, continued from the thorax : wingt* 

 liyaline : abdomen polished : three basal joints rufous ; remain 

 der black. 



Length three-tenths of an inch. 



Resembles the (jihbus F., but is snialler ; with a i>r(>portionally 

 smaller head and much more dense puncturing on the thorax 

 and scutel. 



HYL.55US Latr. 



n. MODESTUS. — 9 Black, opake : abdomen poli.-<h(Ml : hypo^ 

 toma on each side with a triangular whitish spot : collar with an 

 abbreviated, transverse, yellowish line each side : pleura with a 

 yellowish spot under the humerus : wings hyaline, with blackish 

 nervurcs : feet with whitish knees. [393] 



Length over one-fifth of an inch. 



% Head beneath the insertion of the antennjv, pale yellow : 

 antennae beneath dull ochreous : basal joint beneath, pale yel- 

 low : collar immaculate : tibia? and tarsi pale yellowi.sh, tht* 

 former with a black spot near itM tip. 



Length about one-fifth of an inch. 



The spots on the head of the female, an^ like tlio-<- c>| // tyir'- 

 tgatus F., but it is a very different species. 

 1837.] 



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