468 bulletin: museum of comparative zoology. 



171. Dolichodcrus {Hypoclinca) lutosus (F. Smith). 

 Plate 3, fig. 20. 



Several colonies, nesting beneath stones were found at Natal and 

 Baixa Verde. Those from the latter locality are small in size (length 

 3.5 mm.) and are evidently from an incipient colony. A figure of the 

 worker is given in Plate 3, fig. 20. 



Female. Length 6 mm. 



Ocelli very small, arranged in an equilateral triangle. Base of 

 epinotum shorter than declivity. 



Color similar to that of worker but more pronounced. First three 

 gastric segments with a median longitudinal fuscous line; apex of 

 first segment with a narrow transverse fuscous band ; apical two thirds 

 of the second and border of the third segments fuscous. Wings 

 hyaline ; veins and stigma brown. 



Male. Length 3.75 mm. 



Head, excluding the mandibles, as long as broad, convex behind 

 and at sides, with large, moderately convex eyes, which occupy 

 about half the sides. Frontal area distinct, triangular; carinae fine. 

 Clypeus convex at middle, broadly concave at middle of anterior 

 border. Mandibles well developed, stouts, as long as the distance 

 from their base to the eye, blade with several fine teeth anteriorly. 

 Vertex elevated into a broad tubercle on wdiich the large ocelli are 

 located; in front of this, beneath the median ocellus the front has a 

 deep, triangular impression. Antennae short, extending to base of 

 gaster; first funicular joint a third the length of the second. Thorax 

 robust, mesonotum evenly rounded above, with feeble Mayrian fur- 

 rows. Epinotum short, base rounded, declivity flat, the two surfaces 

 separated by an obtuse angle. Petiole twice as high as thick, anterior 

 surface rounded, posteriorly nearly flat, the apex narrowly, thickly 

 margined. Gaster similar to that of worker, but flattened above. 

 Genitalia small. Hypopygium small, broadly triangular. Cerci 

 very small. Legs slender. ^Yings long and narrow. 



Body shining, very minutely punctate. Mandibles punctate, with 

 several long hairs. Body without long hairs. Thorax and abdomen 

 with sparse, regular, very minute scale-like white hairs. Funiculus 

 densely pubescent. 



Color dark fuscous, gastric segments at base lighter. 



