ENTOMOLOGY

COCKROACHES 377abdomen, the tegmina often showing a reddish yellow cast. ';l'he femaleis noticeably larger than the male, of a more uniformly black color andprovided with tegmina only, and these very short, being only about aslong as the pronotum. In addition to the lal'ger size and the shortertegmina, the female can be readily distinguished from the male by theventral surface of the terminal segment of the abdomen, which is planein the male and divided longitudinally for its entire length in the female.This species is truly a gregarious insect, all stages living amicablytogether and often in incredible numbers where conditions are favorablefor its occurrence. It is especially prevalent in cities, being, like theFIG. 71.-The Oriental roach, Blatta orientalis: a, Female; b, male; c, side view of female;d .• half-grown specimen. All natural size. (Marlatt.) From U. S. Dept.Agr., Farmers' Bull. 658, figs. 1, 4.other domesticated species, less generally abundant in rural sections. Itis a lover of warm, damp, unclean locations and often abounds in cheaprestaurants and such places. The female may deposit a number of eggcasesa season, each containing about--s~xteen eggs, and breeding is continuouswhen conditions of warmth, etc., are favorable.Blattella germanica CLinnaeus). Caudell (fig. 79l)The German roach, or Crot.:m bug, vies with the oriental roach in itsimportance as a household pe'5t. It enjoys about as wide a distributionas its larger relative and in f,ome sections it is the more important of thetwo. It is decidedly smaller than orientalis, the male being about one-halfinch long and the female a little longer. Tha general color j" yellowish